Let's get this math done. We have 690 and we're going to multiply it by 419. This is the same as taking 690 and adding it to itself 419 times.
Step 1: 0 + 690 = 690
Step 2: 690 + 690 = 1380
Step 3: 1380 + 690 = 2070
Step 4: 2070 + 690 = 2760
Step 5: 2760 + 690 = 3450
Step 6: 3450 + 690 = 4140
Step 7: 4140 + 690 = 4830
Step 8: 4830 + 690 = 5520
Step 9: 5520 + 690 = 6210
Step 10: 6210 + 690 = 6900
Step 11: 6900 + 690 = 7590
Step 12: 7590 + 690 = 8280
Step 13: 8280 + 690 = 8970
Step 14: 8970 + 690 = 9660
Step 15: 9660 + 690 = 10350
Step 16: 10350 + 690 = 11040
Step 17: 11040 + 690 = 11730
Step 18: 11730 + 690 = 12420
Step 19: 12420 + 690 = 13110
Step 20: 13110 + 690 = 13800
Step 21: 13800 + 690 = 14490
Step 22: 14490 + 690 = 15180
Step 23: 15180 + 690 = 15870
Step 24: 15870 + 690 = 16560
Step 25: 16560 + 690 = 17250
Step 26: 17250 + 690 = 17940
Step 27: 17940 + 690 = 18630
Step 28: 18630 + 690 = 19320
Step 29: 19320 + 690 = 20010
Step 30: 20010 + 690 = 20700
Step 31: 20700 + 690 = 21390
Step 32: 21390 + 690 = 22080
Step 33: 22080 + 690 = 22770
Step 34: 22770 + 690 = 23460
Step 35: 23460 + 690 = 24150
Step 36: 24150 + 690 = 24840
Step 37: 24840 + 690 = 25530
Step 38: 25530 + 690 = 26220
Step 39: 26220 + 690 = 26910
Step 40: 26910 + 690 = 27600
Step 41: 27600 + 690 = 28290
Step 42: 28290 + 690 = 28980
Step 43: 28980 + 690 = 29670
Step 44: 29670 + 690 = 30360
Step 45: 30360 + 690 = 31050
Step 46: 31050 + 690 = 31740
Step 47: 31740 + 690 = 32430
Step 48: 32430 + 690 = 33120
Step 49: 33120 + 690 = 33810
Step 50: 33810 + 690 = 34500
Step 51: 34500 + 690 = 35190
Step 52: 35190 + 690 = 35880
Step 53: 35880 + 690 = 36570
Step 54: 36570 + 690 = 37260
Step 55: 37260 + 690 = 37950
Step 56: 37950 + 690 = 38640
Step 57: 38640 + 690 = 39330
Step 58: 39330 + 690 = 40020
Step 59: 40020 + 690 = 40710
Step 60: 40710 + 690 = 41400
Step 61: 41400 + 690 = 42090
Step 62: 42090 + 690 = 42780
Step 63: 42780 + 690 = 43470
Step 64: 43470 + 690 = 44160
Step 65: 44160 + 690 = 44850
Step 66: 44850 + 690 = 45540
Step 67: 45540 + 690 = 46230
Step 68: 46230 + 690 = 46920
Step 69: 46920 + 690 = 47610
Step 70: 47610 + 690 = 48300
Step 71: 48300 + 690 = 48990
Step 72: 48990 + 690 = 49680
Step 73: 49680 + 690 = 50370
Step 74: 50370 + 690 = 51060
Step 75: 51060 + 690 = 51750
Step 76: 51750 + 690 = 52440
Step 77: 52440 + 690 = 53130
Step 78: 53130 + 690 = 53820
Step 79: 53820 + 690 = 54510
Step 80: 54510 + 690 = 55200
Step 81: 55200 + 690 = 55890
Step 82: 55890 + 690 = 56580
Step 83: 56580 + 690 = 57270
Step 84: 57270 + 690 = 57960
Step 85: 57960 + 690 = 58650
Step 86: 58650 + 690 = 59340
Step 87: 59340 + 690 = 60030
Step 88: 60030 + 690 = 60720
Step 89: 60720 + 690 = 61410
Step 90: 61410 + 690 = 62100
Step 91: 62100 + 690 = 62790
Step 92: 62790 + 690 = 63480
Step 93: 63480 + 690 = 64170
Step 94: 64170 + 690 = 64860
Step 95: 64860 + 690 = 65550
Step 96: 65550 + 690 = 66240
Step 97: 66240 + 690 = 66930
Step 98: 66930 + 690 = 67620
Step 99: 67620 + 690 = 68310
Step 100: 68310 + 690 = 69000
Step 101: 69000 + 690 = 69690
Step 102: 69690 + 690 = 70380
Step 103: 70380 + 690 = 71070
Step 104: 71070 + 690 = 71760
Step 105: 71760 + 690 = 72450
Step 106: 72450 + 690 = 73140
Step 107: 73140 + 690 = 73830
Step 108: 73830 + 690 = 74520
Step 109: 74520 + 690 = 75210
Step 110: 75210 + 690 = 75900
Step 111: 75900 + 690 = 76590
Step 112: 76590 + 690 = 77280
Step 113: 77280 + 690 = 77970
Step 114: 77970 + 690 = 78660
Step 115: 78660 + 690 = 79350
Step 116: 79350 + 690 = 80040
Step 117: 80040 + 690 = 80730
Step 118: 80730 + 690 = 81420
Step 119: 81420 + 690 = 82110
Step 120: 82110 + 690 = 82800
Step 121: 82800 + 690 = 83490
Step 122: 83490 + 690 = 84180
Step 123: 84180 + 690 = 84870
Step 124: 84870 + 690 = 85560
Step 125: 85560 + 690 = 86250
Step 126: 86250 + 690 = 86940
Step 127: 86940 + 690 = 87630
Step 128: 87630 + 690 = 88320
Step 129: 88320 + 690 = 89010
Step 130: 89010 + 690 = 89700
Step 131: 89700 + 690 = 90390
Step 132: 90390 + 690 = 91080
Step 133: 91080 + 690 = 91770
Step 134: 91770 + 690 = 92460
Step 135: 92460 + 690 = 93150
Step 136: 93150 + 690 = 93840
Step 137: 93840 + 690 = 94530
Step 138: 94530 + 690 = 95220
Step 139: 95220 + 690 = 95910
Step 140: 95910 + 690 = 96600
Step 141: 96600 + 690 = 97290
Step 142: 97290 + 690 = 97980
Step 143: 97980 + 690 = 98670
Step 144: 98670 + 690 = 99360
Step 145: 99360 + 690 = 100050
Step 146: 100050 + 690 = 100740
Step 147: 100740 + 690 = 101430
Step 148: 101430 + 690 = 102120
Step 149: 102120 + 690 = 102810
Step 150: 102810 + 690 = 103500
Step 151: 103500 + 690 = 104190
Step 152: 104190 + 690 = 104880
Step 153: 104880 + 690 = 105570
Step 154: 105570 + 690 = 106260
Step 155: 106260 + 690 = 106950
Step 156: 106950 + 690 = 107640
Step 157: 107640 + 690 = 108330
Step 158: 108330 + 690 = 109020
Step 159: 109020 + 690 = 109710
Step 160: 109710 + 690 = 110400
Step 161: 110400 + 690 = 111090
Step 162: 111090 + 690 = 111780
Step 163: 111780 + 690 = 112470
Step 164: 112470 + 690 = 113160
Step 165: 113160 + 690 = 113850
Step 166: 113850 + 690 = 114540
Step 167: 114540 + 690 = 115230
Step 168: 115230 + 690 = 115920
Step 169: 115920 + 690 = 116610
Step 170: 116610 + 690 = 117300
Step 171: 117300 + 690 = 117990
Step 172: 117990 + 690 = 118680
Step 173: 118680 + 690 = 119370
Step 174: 119370 + 690 = 120060
Step 175: 120060 + 690 = 120750
Step 176: 120750 + 690 = 121440
Step 177: 121440 + 690 = 122130
Step 178: 122130 + 690 = 122820
Step 179: 122820 + 690 = 123510
Step 180: 123510 + 690 = 124200
Step 181: 124200 + 690 = 124890
Step 182: 124890 + 690 = 125580
Step 183: 125580 + 690 = 126270
Step 184: 126270 + 690 = 126960
Step 185: 126960 + 690 = 127650
Step 186: 127650 + 690 = 128340
Step 187: 128340 + 690 = 129030
Step 188: 129030 + 690 = 129720
Step 189: 129720 + 690 = 130410
Step 190: 130410 + 690 = 131100
Step 191: 131100 + 690 = 131790
Step 192: 131790 + 690 = 132480
Step 193: 132480 + 690 = 133170
Step 194: 133170 + 690 = 133860
Step 195: 133860 + 690 = 134550
Step 196: 134550 + 690 = 135240
Step 197: 135240 + 690 = 135930
Step 198: 135930 + 690 = 136620
Step 199: 136620 + 690 = 137310
Step 200: 137310 + 690 = 138000
Step 201: 138000 + 690 = 138690
Step 202: 138690 + 690 = 139380
Step 203: 139380 + 690 = 140070
Step 204: 140070 + 690 = 140760
Step 205: 140760 + 690 = 141450
Step 206: 141450 + 690 = 142140
Step 207: 142140 + 690 = 142830
Step 208: 142830 + 690 = 143520
Step 209: 143520 + 690 = 144210
Step 210: 144210 + 690 = 144900
Step 211: 144900 + 690 = 145590
Step 212: 145590 + 690 = 146280
Step 213: 146280 + 690 = 146970
Step 214: 146970 + 690 = 147660
Step 215: 147660 + 690 = 148350
Step 216: 148350 + 690 = 149040
Step 217: 149040 + 690 = 149730
Step 218: 149730 + 690 = 150420
Step 219: 150420 + 690 = 151110
Step 220: 151110 + 690 = 151800
Step 221: 151800 + 690 = 152490
Step 222: 152490 + 690 = 153180
Step 223: 153180 + 690 = 153870
Step 224: 153870 + 690 = 154560
Step 225: 154560 + 690 = 155250
Step 226: 155250 + 690 = 155940
Step 227: 155940 + 690 = 156630
Step 228: 156630 + 690 = 157320
Step 229: 157320 + 690 = 158010
Step 230: 158010 + 690 = 158700
Step 231: 158700 + 690 = 159390
Step 232: 159390 + 690 = 160080
Step 233: 160080 + 690 = 160770
Step 234: 160770 + 690 = 161460
Step 235: 161460 + 690 = 162150
Step 236: 162150 + 690 = 162840
Step 237: 162840 + 690 = 163530
Step 238: 163530 + 690 = 164220
Step 239: 164220 + 690 = 164910
Step 240: 164910 + 690 = 165600
Step 241: 165600 + 690 = 166290
Step 242: 166290 + 690 = 166980
Step 243: 166980 + 690 = 167670
Step 244: 167670 + 690 = 168360
Step 245: 168360 + 690 = 169050
Step 246: 169050 + 690 = 169740
Step 247: 169740 + 690 = 170430
Step 248: 170430 + 690 = 171120
Step 249: 171120 + 690 = 171810
Step 250: 171810 + 690 = 172500
Step 251: 172500 + 690 = 173190
Step 252: 173190 + 690 = 173880
Step 253: 173880 + 690 = 174570
Step 254: 174570 + 690 = 175260
Step 255: 175260 + 690 = 175950
Step 256: 175950 + 690 = 176640
Step 257: 176640 + 690 = 177330
Step 258: 177330 + 690 = 178020
Step 259: 178020 + 690 = 178710
Step 260: 178710 + 690 = 179400
Step 261: 179400 + 690 = 180090
Step 262: 180090 + 690 = 180780
Step 263: 180780 + 690 = 181470
Step 264: 181470 + 690 = 182160
Step 265: 182160 + 690 = 182850
Step 266: 182850 + 690 = 183540
Step 267: 183540 + 690 = 184230
Step 268: 184230 + 690 = 184920
Step 269: 184920 + 690 = 185610
Step 270: 185610 + 690 = 186300
Step 271: 186300 + 690 = 186990
Step 272: 186990 + 690 = 187680
Step 273: 187680 + 690 = 188370
Step 274: 188370 + 690 = 189060
Step 275: 189060 + 690 = 189750
Step 276: 189750 + 690 = 190440
Step 277: 190440 + 690 = 191130
Step 278: 191130 + 690 = 191820
Step 279: 191820 + 690 = 192510
Step 280: 192510 + 690 = 193200
Step 281: 193200 + 690 = 193890
Step 282: 193890 + 690 = 194580
Step 283: 194580 + 690 = 195270
Step 284: 195270 + 690 = 195960
Step 285: 195960 + 690 = 196650
Step 286: 196650 + 690 = 197340
Step 287: 197340 + 690 = 198030
Step 288: 198030 + 690 = 198720
Step 289: 198720 + 690 = 199410
Step 290: 199410 + 690 = 200100
Step 291: 200100 + 690 = 200790
Step 292: 200790 + 690 = 201480
Step 293: 201480 + 690 = 202170
Step 294: 202170 + 690 = 202860
Step 295: 202860 + 690 = 203550
Step 296: 203550 + 690 = 204240
Step 297: 204240 + 690 = 204930
Step 298: 204930 + 690 = 205620
Step 299: 205620 + 690 = 206310
Step 300: 206310 + 690 = 207000
Step 301: 207000 + 690 = 207690
Step 302: 207690 + 690 = 208380
Step 303: 208380 + 690 = 209070
Step 304: 209070 + 690 = 209760
Step 305: 209760 + 690 = 210450
Step 306: 210450 + 690 = 211140
Step 307: 211140 + 690 = 211830
Step 308: 211830 + 690 = 212520
Step 309: 212520 + 690 = 213210
Step 310: 213210 + 690 = 213900
Step 311: 213900 + 690 = 214590
Step 312: 214590 + 690 = 215280
Step 313: 215280 + 690 = 215970
Step 314: 215970 + 690 = 216660
Step 315: 216660 + 690 = 217350
Step 316: 217350 + 690 = 218040
Step 317: 218040 + 690 = 218730
Step 318: 218730 + 690 = 219420
Step 319: 219420 + 690 = 220110
Step 320: 220110 + 690 = 220800
Step 321: 220800 + 690 = 221490
Step 322: 221490 + 690 = 222180
Step 323: 222180 + 690 = 222870
Step 324: 222870 + 690 = 223560
Step 325: 223560 + 690 = 224250
Step 326: 224250 + 690 = 224940
Step 327: 224940 + 690 = 225630
Step 328: 225630 + 690 = 226320
Step 329: 226320 + 690 = 227010
Step 330: 227010 + 690 = 227700
Step 331: 227700 + 690 = 228390
Step 332: 228390 + 690 = 229080
Step 333: 229080 + 690 = 229770
Step 334: 229770 + 690 = 230460
Step 335: 230460 + 690 = 231150
Step 336: 231150 + 690 = 231840
Step 337: 231840 + 690 = 232530
Step 338: 232530 + 690 = 233220
Step 339: 233220 + 690 = 233910
Step 340: 233910 + 690 = 234600
Step 341: 234600 + 690 = 235290
Step 342: 235290 + 690 = 235980
Step 343: 235980 + 690 = 236670
Step 344: 236670 + 690 = 237360
Step 345: 237360 + 690 = 238050
Step 346: 238050 + 690 = 238740
Step 347: 238740 + 690 = 239430
Step 348: 239430 + 690 = 240120
Step 349: 240120 + 690 = 240810
Step 350: 240810 + 690 = 241500
Step 351: 241500 + 690 = 242190
Step 352: 242190 + 690 = 242880
Step 353: 242880 + 690 = 243570
Step 354: 243570 + 690 = 244260
Step 355: 244260 + 690 = 244950
Step 356: 244950 + 690 = 245640
Step 357: 245640 + 690 = 246330
Step 358: 246330 + 690 = 247020
Step 359: 247020 + 690 = 247710
Step 360: 247710 + 690 = 248400
Step 361: 248400 + 690 = 249090
Step 362: 249090 + 690 = 249780
Step 363: 249780 + 690 = 250470
Step 364: 250470 + 690 = 251160
Step 365: 251160 + 690 = 251850
Step 366: 251850 + 690 = 252540
Step 367: 252540 + 690 = 253230
Step 368: 253230 + 690 = 253920
Step 369: 253920 + 690 = 254610
Step 370: 254610 + 690 = 255300
Step 371: 255300 + 690 = 255990
Step 372: 255990 + 690 = 256680
Step 373: 256680 + 690 = 257370
Step 374: 257370 + 690 = 258060
Step 375: 258060 + 690 = 258750
Step 376: 258750 + 690 = 259440
Step 377: 259440 + 690 = 260130
Step 378: 260130 + 690 = 260820
Step 379: 260820 + 690 = 261510
Step 380: 261510 + 690 = 262200
Step 381: 262200 + 690 = 262890
Step 382: 262890 + 690 = 263580
Step 383: 263580 + 690 = 264270
Step 384: 264270 + 690 = 264960
Step 385: 264960 + 690 = 265650
Step 386: 265650 + 690 = 266340
Step 387: 266340 + 690 = 267030
Step 388: 267030 + 690 = 267720
Step 389: 267720 + 690 = 268410
Step 390: 268410 + 690 = 269100
Step 391: 269100 + 690 = 269790
Step 392: 269790 + 690 = 270480
Step 393: 270480 + 690 = 271170
Step 394: 271170 + 690 = 271860
Step 395: 271860 + 690 = 272550
Step 396: 272550 + 690 = 273240
Step 397: 273240 + 690 = 273930
Step 398: 273930 + 690 = 274620
Step 399: 274620 + 690 = 275310
Step 400: 275310 + 690 = 276000
Step 401: 276000 + 690 = 276690
Step 402: 276690 + 690 = 277380
Step 403: 277380 + 690 = 278070
Step 404: 278070 + 690 = 278760
Step 405: 278760 + 690 = 279450
Step 406: 279450 + 690 = 280140
Step 407: 280140 + 690 = 280830
Step 408: 280830 + 690 = 281520
Step 409: 281520 + 690 = 282210
Step 410: 282210 + 690 = 282900
Step 411: 282900 + 690 = 283590
Step 412: 283590 + 690 = 284280
Step 413: 284280 + 690 = 284970
Step 414: 284970 + 690 = 285660
Step 415: 285660 + 690 = 286350
Step 416: 286350 + 690 = 287040
Step 417: 287040 + 690 = 287730
Step 418: 287730 + 690 = 288420
Step 419: 288420 + 690 = 289110

So, 690*419 = 289110