Sure thing! We've got 660 and we're gonna multiply it by 397. That's the same as adding 660 to itself 397 times.
Step 1: 0 + 660 = 660
Step 2: 660 + 660 = 1320
Step 3: 1320 + 660 = 1980
Step 4: 1980 + 660 = 2640
Step 5: 2640 + 660 = 3300
Step 6: 3300 + 660 = 3960
Step 7: 3960 + 660 = 4620
Step 8: 4620 + 660 = 5280
Step 9: 5280 + 660 = 5940
Step 10: 5940 + 660 = 6600
Step 11: 6600 + 660 = 7260
Step 12: 7260 + 660 = 7920
Step 13: 7920 + 660 = 8580
Step 14: 8580 + 660 = 9240
Step 15: 9240 + 660 = 9900
Step 16: 9900 + 660 = 10560
Step 17: 10560 + 660 = 11220
Step 18: 11220 + 660 = 11880
Step 19: 11880 + 660 = 12540
Step 20: 12540 + 660 = 13200
Step 21: 13200 + 660 = 13860
Step 22: 13860 + 660 = 14520
Step 23: 14520 + 660 = 15180
Step 24: 15180 + 660 = 15840
Step 25: 15840 + 660 = 16500
Step 26: 16500 + 660 = 17160
Step 27: 17160 + 660 = 17820
Step 28: 17820 + 660 = 18480
Step 29: 18480 + 660 = 19140
Step 30: 19140 + 660 = 19800
Step 31: 19800 + 660 = 20460
Step 32: 20460 + 660 = 21120
Step 33: 21120 + 660 = 21780
Step 34: 21780 + 660 = 22440
Step 35: 22440 + 660 = 23100
Step 36: 23100 + 660 = 23760
Step 37: 23760 + 660 = 24420
Step 38: 24420 + 660 = 25080
Step 39: 25080 + 660 = 25740
Step 40: 25740 + 660 = 26400
Step 41: 26400 + 660 = 27060
Step 42: 27060 + 660 = 27720
Step 43: 27720 + 660 = 28380
Step 44: 28380 + 660 = 29040
Step 45: 29040 + 660 = 29700
Step 46: 29700 + 660 = 30360
Step 47: 30360 + 660 = 31020
Step 48: 31020 + 660 = 31680
Step 49: 31680 + 660 = 32340
Step 50: 32340 + 660 = 33000
Step 51: 33000 + 660 = 33660
Step 52: 33660 + 660 = 34320
Step 53: 34320 + 660 = 34980
Step 54: 34980 + 660 = 35640
Step 55: 35640 + 660 = 36300
Step 56: 36300 + 660 = 36960
Step 57: 36960 + 660 = 37620
Step 58: 37620 + 660 = 38280
Step 59: 38280 + 660 = 38940
Step 60: 38940 + 660 = 39600
Step 61: 39600 + 660 = 40260
Step 62: 40260 + 660 = 40920
Step 63: 40920 + 660 = 41580
Step 64: 41580 + 660 = 42240
Step 65: 42240 + 660 = 42900
Step 66: 42900 + 660 = 43560
Step 67: 43560 + 660 = 44220
Step 68: 44220 + 660 = 44880
Step 69: 44880 + 660 = 45540
Step 70: 45540 + 660 = 46200
Step 71: 46200 + 660 = 46860
Step 72: 46860 + 660 = 47520
Step 73: 47520 + 660 = 48180
Step 74: 48180 + 660 = 48840
Step 75: 48840 + 660 = 49500
Step 76: 49500 + 660 = 50160
Step 77: 50160 + 660 = 50820
Step 78: 50820 + 660 = 51480
Step 79: 51480 + 660 = 52140
Step 80: 52140 + 660 = 52800
Step 81: 52800 + 660 = 53460
Step 82: 53460 + 660 = 54120
Step 83: 54120 + 660 = 54780
Step 84: 54780 + 660 = 55440
Step 85: 55440 + 660 = 56100
Step 86: 56100 + 660 = 56760
Step 87: 56760 + 660 = 57420
Step 88: 57420 + 660 = 58080
Step 89: 58080 + 660 = 58740
Step 90: 58740 + 660 = 59400
Step 91: 59400 + 660 = 60060
Step 92: 60060 + 660 = 60720
Step 93: 60720 + 660 = 61380
Step 94: 61380 + 660 = 62040
Step 95: 62040 + 660 = 62700
Step 96: 62700 + 660 = 63360
Step 97: 63360 + 660 = 64020
Step 98: 64020 + 660 = 64680
Step 99: 64680 + 660 = 65340
Step 100: 65340 + 660 = 66000
Step 101: 66000 + 660 = 66660
Step 102: 66660 + 660 = 67320
Step 103: 67320 + 660 = 67980
Step 104: 67980 + 660 = 68640
Step 105: 68640 + 660 = 69300
Step 106: 69300 + 660 = 69960
Step 107: 69960 + 660 = 70620
Step 108: 70620 + 660 = 71280
Step 109: 71280 + 660 = 71940
Step 110: 71940 + 660 = 72600
Step 111: 72600 + 660 = 73260
Step 112: 73260 + 660 = 73920
Step 113: 73920 + 660 = 74580
Step 114: 74580 + 660 = 75240
Step 115: 75240 + 660 = 75900
Step 116: 75900 + 660 = 76560
Step 117: 76560 + 660 = 77220
Step 118: 77220 + 660 = 77880
Step 119: 77880 + 660 = 78540
Step 120: 78540 + 660 = 79200
Step 121: 79200 + 660 = 79860
Step 122: 79860 + 660 = 80520
Step 123: 80520 + 660 = 81180
Step 124: 81180 + 660 = 81840
Step 125: 81840 + 660 = 82500
Step 126: 82500 + 660 = 83160
Step 127: 83160 + 660 = 83820
Step 128: 83820 + 660 = 84480
Step 129: 84480 + 660 = 85140
Step 130: 85140 + 660 = 85800
Step 131: 85800 + 660 = 86460
Step 132: 86460 + 660 = 87120
Step 133: 87120 + 660 = 87780
Step 134: 87780 + 660 = 88440
Step 135: 88440 + 660 = 89100
Step 136: 89100 + 660 = 89760
Step 137: 89760 + 660 = 90420
Step 138: 90420 + 660 = 91080
Step 139: 91080 + 660 = 91740
Step 140: 91740 + 660 = 92400
Step 141: 92400 + 660 = 93060
Step 142: 93060 + 660 = 93720
Step 143: 93720 + 660 = 94380
Step 144: 94380 + 660 = 95040
Step 145: 95040 + 660 = 95700
Step 146: 95700 + 660 = 96360
Step 147: 96360 + 660 = 97020
Step 148: 97020 + 660 = 97680
Step 149: 97680 + 660 = 98340
Step 150: 98340 + 660 = 99000
Step 151: 99000 + 660 = 99660
Step 152: 99660 + 660 = 100320
Step 153: 100320 + 660 = 100980
Step 154: 100980 + 660 = 101640
Step 155: 101640 + 660 = 102300
Step 156: 102300 + 660 = 102960
Step 157: 102960 + 660 = 103620
Step 158: 103620 + 660 = 104280
Step 159: 104280 + 660 = 104940
Step 160: 104940 + 660 = 105600
Step 161: 105600 + 660 = 106260
Step 162: 106260 + 660 = 106920
Step 163: 106920 + 660 = 107580
Step 164: 107580 + 660 = 108240
Step 165: 108240 + 660 = 108900
Step 166: 108900 + 660 = 109560
Step 167: 109560 + 660 = 110220
Step 168: 110220 + 660 = 110880
Step 169: 110880 + 660 = 111540
Step 170: 111540 + 660 = 112200
Step 171: 112200 + 660 = 112860
Step 172: 112860 + 660 = 113520
Step 173: 113520 + 660 = 114180
Step 174: 114180 + 660 = 114840
Step 175: 114840 + 660 = 115500
Step 176: 115500 + 660 = 116160
Step 177: 116160 + 660 = 116820
Step 178: 116820 + 660 = 117480
Step 179: 117480 + 660 = 118140
Step 180: 118140 + 660 = 118800
Step 181: 118800 + 660 = 119460
Step 182: 119460 + 660 = 120120
Step 183: 120120 + 660 = 120780
Step 184: 120780 + 660 = 121440
Step 185: 121440 + 660 = 122100
Step 186: 122100 + 660 = 122760
Step 187: 122760 + 660 = 123420
Step 188: 123420 + 660 = 124080
Step 189: 124080 + 660 = 124740
Step 190: 124740 + 660 = 125400
Step 191: 125400 + 660 = 126060
Step 192: 126060 + 660 = 126720
Step 193: 126720 + 660 = 127380
Step 194: 127380 + 660 = 128040
Step 195: 128040 + 660 = 128700
Step 196: 128700 + 660 = 129360
Step 197: 129360 + 660 = 130020
Step 198: 130020 + 660 = 130680
Step 199: 130680 + 660 = 131340
Step 200: 131340 + 660 = 132000
Step 201: 132000 + 660 = 132660
Step 202: 132660 + 660 = 133320
Step 203: 133320 + 660 = 133980
Step 204: 133980 + 660 = 134640
Step 205: 134640 + 660 = 135300
Step 206: 135300 + 660 = 135960
Step 207: 135960 + 660 = 136620
Step 208: 136620 + 660 = 137280
Step 209: 137280 + 660 = 137940
Step 210: 137940 + 660 = 138600
Step 211: 138600 + 660 = 139260
Step 212: 139260 + 660 = 139920
Step 213: 139920 + 660 = 140580
Step 214: 140580 + 660 = 141240
Step 215: 141240 + 660 = 141900
Step 216: 141900 + 660 = 142560
Step 217: 142560 + 660 = 143220
Step 218: 143220 + 660 = 143880
Step 219: 143880 + 660 = 144540
Step 220: 144540 + 660 = 145200
Step 221: 145200 + 660 = 145860
Step 222: 145860 + 660 = 146520
Step 223: 146520 + 660 = 147180
Step 224: 147180 + 660 = 147840
Step 225: 147840 + 660 = 148500
Step 226: 148500 + 660 = 149160
Step 227: 149160 + 660 = 149820
Step 228: 149820 + 660 = 150480
Step 229: 150480 + 660 = 151140
Step 230: 151140 + 660 = 151800
Step 231: 151800 + 660 = 152460
Step 232: 152460 + 660 = 153120
Step 233: 153120 + 660 = 153780
Step 234: 153780 + 660 = 154440
Step 235: 154440 + 660 = 155100
Step 236: 155100 + 660 = 155760
Step 237: 155760 + 660 = 156420
Step 238: 156420 + 660 = 157080
Step 239: 157080 + 660 = 157740
Step 240: 157740 + 660 = 158400
Step 241: 158400 + 660 = 159060
Step 242: 159060 + 660 = 159720
Step 243: 159720 + 660 = 160380
Step 244: 160380 + 660 = 161040
Step 245: 161040 + 660 = 161700
Step 246: 161700 + 660 = 162360
Step 247: 162360 + 660 = 163020
Step 248: 163020 + 660 = 163680
Step 249: 163680 + 660 = 164340
Step 250: 164340 + 660 = 165000
Step 251: 165000 + 660 = 165660
Step 252: 165660 + 660 = 166320
Step 253: 166320 + 660 = 166980
Step 254: 166980 + 660 = 167640
Step 255: 167640 + 660 = 168300
Step 256: 168300 + 660 = 168960
Step 257: 168960 + 660 = 169620
Step 258: 169620 + 660 = 170280
Step 259: 170280 + 660 = 170940
Step 260: 170940 + 660 = 171600
Step 261: 171600 + 660 = 172260
Step 262: 172260 + 660 = 172920
Step 263: 172920 + 660 = 173580
Step 264: 173580 + 660 = 174240
Step 265: 174240 + 660 = 174900
Step 266: 174900 + 660 = 175560
Step 267: 175560 + 660 = 176220
Step 268: 176220 + 660 = 176880
Step 269: 176880 + 660 = 177540
Step 270: 177540 + 660 = 178200
Step 271: 178200 + 660 = 178860
Step 272: 178860 + 660 = 179520
Step 273: 179520 + 660 = 180180
Step 274: 180180 + 660 = 180840
Step 275: 180840 + 660 = 181500
Step 276: 181500 + 660 = 182160
Step 277: 182160 + 660 = 182820
Step 278: 182820 + 660 = 183480
Step 279: 183480 + 660 = 184140
Step 280: 184140 + 660 = 184800
Step 281: 184800 + 660 = 185460
Step 282: 185460 + 660 = 186120
Step 283: 186120 + 660 = 186780
Step 284: 186780 + 660 = 187440
Step 285: 187440 + 660 = 188100
Step 286: 188100 + 660 = 188760
Step 287: 188760 + 660 = 189420
Step 288: 189420 + 660 = 190080
Step 289: 190080 + 660 = 190740
Step 290: 190740 + 660 = 191400
Step 291: 191400 + 660 = 192060
Step 292: 192060 + 660 = 192720
Step 293: 192720 + 660 = 193380
Step 294: 193380 + 660 = 194040
Step 295: 194040 + 660 = 194700
Step 296: 194700 + 660 = 195360
Step 297: 195360 + 660 = 196020
Step 298: 196020 + 660 = 196680
Step 299: 196680 + 660 = 197340
Step 300: 197340 + 660 = 198000
Step 301: 198000 + 660 = 198660
Step 302: 198660 + 660 = 199320
Step 303: 199320 + 660 = 199980
Step 304: 199980 + 660 = 200640
Step 305: 200640 + 660 = 201300
Step 306: 201300 + 660 = 201960
Step 307: 201960 + 660 = 202620
Step 308: 202620 + 660 = 203280
Step 309: 203280 + 660 = 203940
Step 310: 203940 + 660 = 204600
Step 311: 204600 + 660 = 205260
Step 312: 205260 + 660 = 205920
Step 313: 205920 + 660 = 206580
Step 314: 206580 + 660 = 207240
Step 315: 207240 + 660 = 207900
Step 316: 207900 + 660 = 208560
Step 317: 208560 + 660 = 209220
Step 318: 209220 + 660 = 209880
Step 319: 209880 + 660 = 210540
Step 320: 210540 + 660 = 211200
Step 321: 211200 + 660 = 211860
Step 322: 211860 + 660 = 212520
Step 323: 212520 + 660 = 213180
Step 324: 213180 + 660 = 213840
Step 325: 213840 + 660 = 214500
Step 326: 214500 + 660 = 215160
Step 327: 215160 + 660 = 215820
Step 328: 215820 + 660 = 216480
Step 329: 216480 + 660 = 217140
Step 330: 217140 + 660 = 217800
Step 331: 217800 + 660 = 218460
Step 332: 218460 + 660 = 219120
Step 333: 219120 + 660 = 219780
Step 334: 219780 + 660 = 220440
Step 335: 220440 + 660 = 221100
Step 336: 221100 + 660 = 221760
Step 337: 221760 + 660 = 222420
Step 338: 222420 + 660 = 223080
Step 339: 223080 + 660 = 223740
Step 340: 223740 + 660 = 224400
Step 341: 224400 + 660 = 225060
Step 342: 225060 + 660 = 225720
Step 343: 225720 + 660 = 226380
Step 344: 226380 + 660 = 227040
Step 345: 227040 + 660 = 227700
Step 346: 227700 + 660 = 228360
Step 347: 228360 + 660 = 229020
Step 348: 229020 + 660 = 229680
Step 349: 229680 + 660 = 230340
Step 350: 230340 + 660 = 231000
Step 351: 231000 + 660 = 231660
Step 352: 231660 + 660 = 232320
Step 353: 232320 + 660 = 232980
Step 354: 232980 + 660 = 233640
Step 355: 233640 + 660 = 234300
Step 356: 234300 + 660 = 234960
Step 357: 234960 + 660 = 235620
Step 358: 235620 + 660 = 236280
Step 359: 236280 + 660 = 236940
Step 360: 236940 + 660 = 237600
Step 361: 237600 + 660 = 238260
Step 362: 238260 + 660 = 238920
Step 363: 238920 + 660 = 239580
Step 364: 239580 + 660 = 240240
Step 365: 240240 + 660 = 240900
Step 366: 240900 + 660 = 241560
Step 367: 241560 + 660 = 242220
Step 368: 242220 + 660 = 242880
Step 369: 242880 + 660 = 243540
Step 370: 243540 + 660 = 244200
Step 371: 244200 + 660 = 244860
Step 372: 244860 + 660 = 245520
Step 373: 245520 + 660 = 246180
Step 374: 246180 + 660 = 246840
Step 375: 246840 + 660 = 247500
Step 376: 247500 + 660 = 248160
Step 377: 248160 + 660 = 248820
Step 378: 248820 + 660 = 249480
Step 379: 249480 + 660 = 250140
Step 380: 250140 + 660 = 250800
Step 381: 250800 + 660 = 251460
Step 382: 251460 + 660 = 252120
Step 383: 252120 + 660 = 252780
Step 384: 252780 + 660 = 253440
Step 385: 253440 + 660 = 254100
Step 386: 254100 + 660 = 254760
Step 387: 254760 + 660 = 255420
Step 388: 255420 + 660 = 256080
Step 389: 256080 + 660 = 256740
Step 390: 256740 + 660 = 257400
Step 391: 257400 + 660 = 258060
Step 392: 258060 + 660 = 258720
Step 393: 258720 + 660 = 259380
Step 394: 259380 + 660 = 260040
Step 395: 260040 + 660 = 260700
Step 396: 260700 + 660 = 261360
Step 397: 261360 + 660 = 262020

So, 660*397 = 262020