Sure thing, let's get straight to it. We start with 780 and we're going to multiply it by 450, which means adding 780 to itself 450 times.
Step 1: 0 + 780 = 780
Step 2: 780 + 780 = 1560
Step 3: 1560 + 780 = 2340
Step 4: 2340 + 780 = 3120
Step 5: 3120 + 780 = 3900
Step 6: 3900 + 780 = 4680
Step 7: 4680 + 780 = 5460
Step 8: 5460 + 780 = 6240
Step 9: 6240 + 780 = 7020
Step 10: 7020 + 780 = 7800
Step 11: 7800 + 780 = 8580
Step 12: 8580 + 780 = 9360
Step 13: 9360 + 780 = 10140
Step 14: 10140 + 780 = 10920
Step 15: 10920 + 780 = 11700
Step 16: 11700 + 780 = 12480
Step 17: 12480 + 780 = 13260
Step 18: 13260 + 780 = 14040
Step 19: 14040 + 780 = 14820
Step 20: 14820 + 780 = 15600
Step 21: 15600 + 780 = 16380
Step 22: 16380 + 780 = 17160
Step 23: 17160 + 780 = 17940
Step 24: 17940 + 780 = 18720
Step 25: 18720 + 780 = 19500
Step 26: 19500 + 780 = 20280
Step 27: 20280 + 780 = 21060
Step 28: 21060 + 780 = 21840
Step 29: 21840 + 780 = 22620
Step 30: 22620 + 780 = 23400
Step 31: 23400 + 780 = 24180
Step 32: 24180 + 780 = 24960
Step 33: 24960 + 780 = 25740
Step 34: 25740 + 780 = 26520
Step 35: 26520 + 780 = 27300
Step 36: 27300 + 780 = 28080
Step 37: 28080 + 780 = 28860
Step 38: 28860 + 780 = 29640
Step 39: 29640 + 780 = 30420
Step 40: 30420 + 780 = 31200
Step 41: 31200 + 780 = 31980
Step 42: 31980 + 780 = 32760
Step 43: 32760 + 780 = 33540
Step 44: 33540 + 780 = 34320
Step 45: 34320 + 780 = 35100
Step 46: 35100 + 780 = 35880
Step 47: 35880 + 780 = 36660
Step 48: 36660 + 780 = 37440
Step 49: 37440 + 780 = 38220
Step 50: 38220 + 780 = 39000
Step 51: 39000 + 780 = 39780
Step 52: 39780 + 780 = 40560
Step 53: 40560 + 780 = 41340
Step 54: 41340 + 780 = 42120
Step 55: 42120 + 780 = 42900
Step 56: 42900 + 780 = 43680
Step 57: 43680 + 780 = 44460
Step 58: 44460 + 780 = 45240
Step 59: 45240 + 780 = 46020
Step 60: 46020 + 780 = 46800
Step 61: 46800 + 780 = 47580
Step 62: 47580 + 780 = 48360
Step 63: 48360 + 780 = 49140
Step 64: 49140 + 780 = 49920
Step 65: 49920 + 780 = 50700
Step 66: 50700 + 780 = 51480
Step 67: 51480 + 780 = 52260
Step 68: 52260 + 780 = 53040
Step 69: 53040 + 780 = 53820
Step 70: 53820 + 780 = 54600
Step 71: 54600 + 780 = 55380
Step 72: 55380 + 780 = 56160
Step 73: 56160 + 780 = 56940
Step 74: 56940 + 780 = 57720
Step 75: 57720 + 780 = 58500
Step 76: 58500 + 780 = 59280
Step 77: 59280 + 780 = 60060
Step 78: 60060 + 780 = 60840
Step 79: 60840 + 780 = 61620
Step 80: 61620 + 780 = 62400
Step 81: 62400 + 780 = 63180
Step 82: 63180 + 780 = 63960
Step 83: 63960 + 780 = 64740
Step 84: 64740 + 780 = 65520
Step 85: 65520 + 780 = 66300
Step 86: 66300 + 780 = 67080
Step 87: 67080 + 780 = 67860
Step 88: 67860 + 780 = 68640
Step 89: 68640 + 780 = 69420
Step 90: 69420 + 780 = 70200
Step 91: 70200 + 780 = 70980
Step 92: 70980 + 780 = 71760
Step 93: 71760 + 780 = 72540
Step 94: 72540 + 780 = 73320
Step 95: 73320 + 780 = 74100
Step 96: 74100 + 780 = 74880
Step 97: 74880 + 780 = 75660
Step 98: 75660 + 780 = 76440
Step 99: 76440 + 780 = 77220
Step 100: 77220 + 780 = 78000
Step 101: 78000 + 780 = 78780
Step 102: 78780 + 780 = 79560
Step 103: 79560 + 780 = 80340
Step 104: 80340 + 780 = 81120
Step 105: 81120 + 780 = 81900
Step 106: 81900 + 780 = 82680
Step 107: 82680 + 780 = 83460
Step 108: 83460 + 780 = 84240
Step 109: 84240 + 780 = 85020
Step 110: 85020 + 780 = 85800
Step 111: 85800 + 780 = 86580
Step 112: 86580 + 780 = 87360
Step 113: 87360 + 780 = 88140
Step 114: 88140 + 780 = 88920
Step 115: 88920 + 780 = 89700
Step 116: 89700 + 780 = 90480
Step 117: 90480 + 780 = 91260
Step 118: 91260 + 780 = 92040
Step 119: 92040 + 780 = 92820
Step 120: 92820 + 780 = 93600
Step 121: 93600 + 780 = 94380
Step 122: 94380 + 780 = 95160
Step 123: 95160 + 780 = 95940
Step 124: 95940 + 780 = 96720
Step 125: 96720 + 780 = 97500
Step 126: 97500 + 780 = 98280
Step 127: 98280 + 780 = 99060
Step 128: 99060 + 780 = 99840
Step 129: 99840 + 780 = 100620
Step 130: 100620 + 780 = 101400
Step 131: 101400 + 780 = 102180
Step 132: 102180 + 780 = 102960
Step 133: 102960 + 780 = 103740
Step 134: 103740 + 780 = 104520
Step 135: 104520 + 780 = 105300
Step 136: 105300 + 780 = 106080
Step 137: 106080 + 780 = 106860
Step 138: 106860 + 780 = 107640
Step 139: 107640 + 780 = 108420
Step 140: 108420 + 780 = 109200
Step 141: 109200 + 780 = 109980
Step 142: 109980 + 780 = 110760
Step 143: 110760 + 780 = 111540
Step 144: 111540 + 780 = 112320
Step 145: 112320 + 780 = 113100
Step 146: 113100 + 780 = 113880
Step 147: 113880 + 780 = 114660
Step 148: 114660 + 780 = 115440
Step 149: 115440 + 780 = 116220
Step 150: 116220 + 780 = 117000
Step 151: 117000 + 780 = 117780
Step 152: 117780 + 780 = 118560
Step 153: 118560 + 780 = 119340
Step 154: 119340 + 780 = 120120
Step 155: 120120 + 780 = 120900
Step 156: 120900 + 780 = 121680
Step 157: 121680 + 780 = 122460
Step 158: 122460 + 780 = 123240
Step 159: 123240 + 780 = 124020
Step 160: 124020 + 780 = 124800
Step 161: 124800 + 780 = 125580
Step 162: 125580 + 780 = 126360
Step 163: 126360 + 780 = 127140
Step 164: 127140 + 780 = 127920
Step 165: 127920 + 780 = 128700
Step 166: 128700 + 780 = 129480
Step 167: 129480 + 780 = 130260
Step 168: 130260 + 780 = 131040
Step 169: 131040 + 780 = 131820
Step 170: 131820 + 780 = 132600
Step 171: 132600 + 780 = 133380
Step 172: 133380 + 780 = 134160
Step 173: 134160 + 780 = 134940
Step 174: 134940 + 780 = 135720
Step 175: 135720 + 780 = 136500
Step 176: 136500 + 780 = 137280
Step 177: 137280 + 780 = 138060
Step 178: 138060 + 780 = 138840
Step 179: 138840 + 780 = 139620
Step 180: 139620 + 780 = 140400
Step 181: 140400 + 780 = 141180
Step 182: 141180 + 780 = 141960
Step 183: 141960 + 780 = 142740
Step 184: 142740 + 780 = 143520
Step 185: 143520 + 780 = 144300
Step 186: 144300 + 780 = 145080
Step 187: 145080 + 780 = 145860
Step 188: 145860 + 780 = 146640
Step 189: 146640 + 780 = 147420
Step 190: 147420 + 780 = 148200
Step 191: 148200 + 780 = 148980
Step 192: 148980 + 780 = 149760
Step 193: 149760 + 780 = 150540
Step 194: 150540 + 780 = 151320
Step 195: 151320 + 780 = 152100
Step 196: 152100 + 780 = 152880
Step 197: 152880 + 780 = 153660
Step 198: 153660 + 780 = 154440
Step 199: 154440 + 780 = 155220
Step 200: 155220 + 780 = 156000
Step 201: 156000 + 780 = 156780
Step 202: 156780 + 780 = 157560
Step 203: 157560 + 780 = 158340
Step 204: 158340 + 780 = 159120
Step 205: 159120 + 780 = 159900
Step 206: 159900 + 780 = 160680
Step 207: 160680 + 780 = 161460
Step 208: 161460 + 780 = 162240
Step 209: 162240 + 780 = 163020
Step 210: 163020 + 780 = 163800
Step 211: 163800 + 780 = 164580
Step 212: 164580 + 780 = 165360
Step 213: 165360 + 780 = 166140
Step 214: 166140 + 780 = 166920
Step 215: 166920 + 780 = 167700
Step 216: 167700 + 780 = 168480
Step 217: 168480 + 780 = 169260
Step 218: 169260 + 780 = 170040
Step 219: 170040 + 780 = 170820
Step 220: 170820 + 780 = 171600
Step 221: 171600 + 780 = 172380
Step 222: 172380 + 780 = 173160
Step 223: 173160 + 780 = 173940
Step 224: 173940 + 780 = 174720
Step 225: 174720 + 780 = 175500
Step 226: 175500 + 780 = 176280
Step 227: 176280 + 780 = 177060
Step 228: 177060 + 780 = 177840
Step 229: 177840 + 780 = 178620
Step 230: 178620 + 780 = 179400
Step 231: 179400 + 780 = 180180
Step 232: 180180 + 780 = 180960
Step 233: 180960 + 780 = 181740
Step 234: 181740 + 780 = 182520
Step 235: 182520 + 780 = 183300
Step 236: 183300 + 780 = 184080
Step 237: 184080 + 780 = 184860
Step 238: 184860 + 780 = 185640
Step 239: 185640 + 780 = 186420
Step 240: 186420 + 780 = 187200
Step 241: 187200 + 780 = 187980
Step 242: 187980 + 780 = 188760
Step 243: 188760 + 780 = 189540
Step 244: 189540 + 780 = 190320
Step 245: 190320 + 780 = 191100
Step 246: 191100 + 780 = 191880
Step 247: 191880 + 780 = 192660
Step 248: 192660 + 780 = 193440
Step 249: 193440 + 780 = 194220
Step 250: 194220 + 780 = 195000
Step 251: 195000 + 780 = 195780
Step 252: 195780 + 780 = 196560
Step 253: 196560 + 780 = 197340
Step 254: 197340 + 780 = 198120
Step 255: 198120 + 780 = 198900
Step 256: 198900 + 780 = 199680
Step 257: 199680 + 780 = 200460
Step 258: 200460 + 780 = 201240
Step 259: 201240 + 780 = 202020
Step 260: 202020 + 780 = 202800
Step 261: 202800 + 780 = 203580
Step 262: 203580 + 780 = 204360
Step 263: 204360 + 780 = 205140
Step 264: 205140 + 780 = 205920
Step 265: 205920 + 780 = 206700
Step 266: 206700 + 780 = 207480
Step 267: 207480 + 780 = 208260
Step 268: 208260 + 780 = 209040
Step 269: 209040 + 780 = 209820
Step 270: 209820 + 780 = 210600
Step 271: 210600 + 780 = 211380
Step 272: 211380 + 780 = 212160
Step 273: 212160 + 780 = 212940
Step 274: 212940 + 780 = 213720
Step 275: 213720 + 780 = 214500
Step 276: 214500 + 780 = 215280
Step 277: 215280 + 780 = 216060
Step 278: 216060 + 780 = 216840
Step 279: 216840 + 780 = 217620
Step 280: 217620 + 780 = 218400
Step 281: 218400 + 780 = 219180
Step 282: 219180 + 780 = 219960
Step 283: 219960 + 780 = 220740
Step 284: 220740 + 780 = 221520
Step 285: 221520 + 780 = 222300
Step 286: 222300 + 780 = 223080
Step 287: 223080 + 780 = 223860
Step 288: 223860 + 780 = 224640
Step 289: 224640 + 780 = 225420
Step 290: 225420 + 780 = 226200
Step 291: 226200 + 780 = 226980
Step 292: 226980 + 780 = 227760
Step 293: 227760 + 780 = 228540
Step 294: 228540 + 780 = 229320
Step 295: 229320 + 780 = 230100
Step 296: 230100 + 780 = 230880
Step 297: 230880 + 780 = 231660
Step 298: 231660 + 780 = 232440
Step 299: 232440 + 780 = 233220
Step 300: 233220 + 780 = 234000
Step 301: 234000 + 780 = 234780
Step 302: 234780 + 780 = 235560
Step 303: 235560 + 780 = 236340
Step 304: 236340 + 780 = 237120
Step 305: 237120 + 780 = 237900
Step 306: 237900 + 780 = 238680
Step 307: 238680 + 780 = 239460
Step 308: 239460 + 780 = 240240
Step 309: 240240 + 780 = 241020
Step 310: 241020 + 780 = 241800
Step 311: 241800 + 780 = 242580
Step 312: 242580 + 780 = 243360
Step 313: 243360 + 780 = 244140
Step 314: 244140 + 780 = 244920
Step 315: 244920 + 780 = 245700
Step 316: 245700 + 780 = 246480
Step 317: 246480 + 780 = 247260
Step 318: 247260 + 780 = 248040
Step 319: 248040 + 780 = 248820
Step 320: 248820 + 780 = 249600
Step 321: 249600 + 780 = 250380
Step 322: 250380 + 780 = 251160
Step 323: 251160 + 780 = 251940
Step 324: 251940 + 780 = 252720
Step 325: 252720 + 780 = 253500
Step 326: 253500 + 780 = 254280
Step 327: 254280 + 780 = 255060
Step 328: 255060 + 780 = 255840
Step 329: 255840 + 780 = 256620
Step 330: 256620 + 780 = 257400
Step 331: 257400 + 780 = 258180
Step 332: 258180 + 780 = 258960
Step 333: 258960 + 780 = 259740
Step 334: 259740 + 780 = 260520
Step 335: 260520 + 780 = 261300
Step 336: 261300 + 780 = 262080
Step 337: 262080 + 780 = 262860
Step 338: 262860 + 780 = 263640
Step 339: 263640 + 780 = 264420
Step 340: 264420 + 780 = 265200
Step 341: 265200 + 780 = 265980
Step 342: 265980 + 780 = 266760
Step 343: 266760 + 780 = 267540
Step 344: 267540 + 780 = 268320
Step 345: 268320 + 780 = 269100
Step 346: 269100 + 780 = 269880
Step 347: 269880 + 780 = 270660
Step 348: 270660 + 780 = 271440
Step 349: 271440 + 780 = 272220
Step 350: 272220 + 780 = 273000
Step 351: 273000 + 780 = 273780
Step 352: 273780 + 780 = 274560
Step 353: 274560 + 780 = 275340
Step 354: 275340 + 780 = 276120
Step 355: 276120 + 780 = 276900
Step 356: 276900 + 780 = 277680
Step 357: 277680 + 780 = 278460
Step 358: 278460 + 780 = 279240
Step 359: 279240 + 780 = 280020
Step 360: 280020 + 780 = 280800
Step 361: 280800 + 780 = 281580
Step 362: 281580 + 780 = 282360
Step 363: 282360 + 780 = 283140
Step 364: 283140 + 780 = 283920
Step 365: 283920 + 780 = 284700
Step 366: 284700 + 780 = 285480
Step 367: 285480 + 780 = 286260
Step 368: 286260 + 780 = 287040
Step 369: 287040 + 780 = 287820
Step 370: 287820 + 780 = 288600
Step 371: 288600 + 780 = 289380
Step 372: 289380 + 780 = 290160
Step 373: 290160 + 780 = 290940
Step 374: 290940 + 780 = 291720
Step 375: 291720 + 780 = 292500
Step 376: 292500 + 780 = 293280
Step 377: 293280 + 780 = 294060
Step 378: 294060 + 780 = 294840
Step 379: 294840 + 780 = 295620
Step 380: 295620 + 780 = 296400
Step 381: 296400 + 780 = 297180
Step 382: 297180 + 780 = 297960
Step 383: 297960 + 780 = 298740
Step 384: 298740 + 780 = 299520
Step 385: 299520 + 780 = 300300
Step 386: 300300 + 780 = 301080
Step 387: 301080 + 780 = 301860
Step 388: 301860 + 780 = 302640
Step 389: 302640 + 780 = 303420
Step 390: 303420 + 780 = 304200
Step 391: 304200 + 780 = 304980
Step 392: 304980 + 780 = 305760
Step 393: 305760 + 780 = 306540
Step 394: 306540 + 780 = 307320
Step 395: 307320 + 780 = 308100
Step 396: 308100 + 780 = 308880
Step 397: 308880 + 780 = 309660
Step 398: 309660 + 780 = 310440
Step 399: 310440 + 780 = 311220
Step 400: 311220 + 780 = 312000
Step 401: 312000 + 780 = 312780
Step 402: 312780 + 780 = 313560
Step 403: 313560 + 780 = 314340
Step 404: 314340 + 780 = 315120
Step 405: 315120 + 780 = 315900
Step 406: 315900 + 780 = 316680
Step 407: 316680 + 780 = 317460
Step 408: 317460 + 780 = 318240
Step 409: 318240 + 780 = 319020
Step 410: 319020 + 780 = 319800
Step 411: 319800 + 780 = 320580
Step 412: 320580 + 780 = 321360
Step 413: 321360 + 780 = 322140
Step 414: 322140 + 780 = 322920
Step 415: 322920 + 780 = 323700
Step 416: 323700 + 780 = 324480
Step 417: 324480 + 780 = 325260
Step 418: 325260 + 780 = 326040
Step 419: 326040 + 780 = 326820
Step 420: 326820 + 780 = 327600
Step 421: 327600 + 780 = 328380
Step 422: 328380 + 780 = 329160
Step 423: 329160 + 780 = 329940
Step 424: 329940 + 780 = 330720
Step 425: 330720 + 780 = 331500
Step 426: 331500 + 780 = 332280
Step 427: 332280 + 780 = 333060
Step 428: 333060 + 780 = 333840
Step 429: 333840 + 780 = 334620
Step 430: 334620 + 780 = 335400
Step 431: 335400 + 780 = 336180
Step 432: 336180 + 780 = 336960
Step 433: 336960 + 780 = 337740
Step 434: 337740 + 780 = 338520
Step 435: 338520 + 780 = 339300
Step 436: 339300 + 780 = 340080
Step 437: 340080 + 780 = 340860
Step 438: 340860 + 780 = 341640
Step 439: 341640 + 780 = 342420
Step 440: 342420 + 780 = 343200
Step 441: 343200 + 780 = 343980
Step 442: 343980 + 780 = 344760
Step 443: 344760 + 780 = 345540
Step 444: 345540 + 780 = 346320
Step 445: 346320 + 780 = 347100
Step 446: 347100 + 780 = 347880
Step 447: 347880 + 780 = 348660
Step 448: 348660 + 780 = 349440
Step 449: 349440 + 780 = 350220
Step 450: 350220 + 780 = 351000

So, 780*450 = 351000