Let's roll up our sleeves and solve this. We have 984 and we're going to multiply it by 398, essentially adding 984 to itself 398 times.
Step 1: 0 + 984 = 984
Step 2: 984 + 984 = 1968
Step 3: 1968 + 984 = 2952
Step 4: 2952 + 984 = 3936
Step 5: 3936 + 984 = 4920
Step 6: 4920 + 984 = 5904
Step 7: 5904 + 984 = 6888
Step 8: 6888 + 984 = 7872
Step 9: 7872 + 984 = 8856
Step 10: 8856 + 984 = 9840
Step 11: 9840 + 984 = 10824
Step 12: 10824 + 984 = 11808
Step 13: 11808 + 984 = 12792
Step 14: 12792 + 984 = 13776
Step 15: 13776 + 984 = 14760
Step 16: 14760 + 984 = 15744
Step 17: 15744 + 984 = 16728
Step 18: 16728 + 984 = 17712
Step 19: 17712 + 984 = 18696
Step 20: 18696 + 984 = 19680
Step 21: 19680 + 984 = 20664
Step 22: 20664 + 984 = 21648
Step 23: 21648 + 984 = 22632
Step 24: 22632 + 984 = 23616
Step 25: 23616 + 984 = 24600
Step 26: 24600 + 984 = 25584
Step 27: 25584 + 984 = 26568
Step 28: 26568 + 984 = 27552
Step 29: 27552 + 984 = 28536
Step 30: 28536 + 984 = 29520
Step 31: 29520 + 984 = 30504
Step 32: 30504 + 984 = 31488
Step 33: 31488 + 984 = 32472
Step 34: 32472 + 984 = 33456
Step 35: 33456 + 984 = 34440
Step 36: 34440 + 984 = 35424
Step 37: 35424 + 984 = 36408
Step 38: 36408 + 984 = 37392
Step 39: 37392 + 984 = 38376
Step 40: 38376 + 984 = 39360
Step 41: 39360 + 984 = 40344
Step 42: 40344 + 984 = 41328
Step 43: 41328 + 984 = 42312
Step 44: 42312 + 984 = 43296
Step 45: 43296 + 984 = 44280
Step 46: 44280 + 984 = 45264
Step 47: 45264 + 984 = 46248
Step 48: 46248 + 984 = 47232
Step 49: 47232 + 984 = 48216
Step 50: 48216 + 984 = 49200
Step 51: 49200 + 984 = 50184
Step 52: 50184 + 984 = 51168
Step 53: 51168 + 984 = 52152
Step 54: 52152 + 984 = 53136
Step 55: 53136 + 984 = 54120
Step 56: 54120 + 984 = 55104
Step 57: 55104 + 984 = 56088
Step 58: 56088 + 984 = 57072
Step 59: 57072 + 984 = 58056
Step 60: 58056 + 984 = 59040
Step 61: 59040 + 984 = 60024
Step 62: 60024 + 984 = 61008
Step 63: 61008 + 984 = 61992
Step 64: 61992 + 984 = 62976
Step 65: 62976 + 984 = 63960
Step 66: 63960 + 984 = 64944
Step 67: 64944 + 984 = 65928
Step 68: 65928 + 984 = 66912
Step 69: 66912 + 984 = 67896
Step 70: 67896 + 984 = 68880
Step 71: 68880 + 984 = 69864
Step 72: 69864 + 984 = 70848
Step 73: 70848 + 984 = 71832
Step 74: 71832 + 984 = 72816
Step 75: 72816 + 984 = 73800
Step 76: 73800 + 984 = 74784
Step 77: 74784 + 984 = 75768
Step 78: 75768 + 984 = 76752
Step 79: 76752 + 984 = 77736
Step 80: 77736 + 984 = 78720
Step 81: 78720 + 984 = 79704
Step 82: 79704 + 984 = 80688
Step 83: 80688 + 984 = 81672
Step 84: 81672 + 984 = 82656
Step 85: 82656 + 984 = 83640
Step 86: 83640 + 984 = 84624
Step 87: 84624 + 984 = 85608
Step 88: 85608 + 984 = 86592
Step 89: 86592 + 984 = 87576
Step 90: 87576 + 984 = 88560
Step 91: 88560 + 984 = 89544
Step 92: 89544 + 984 = 90528
Step 93: 90528 + 984 = 91512
Step 94: 91512 + 984 = 92496
Step 95: 92496 + 984 = 93480
Step 96: 93480 + 984 = 94464
Step 97: 94464 + 984 = 95448
Step 98: 95448 + 984 = 96432
Step 99: 96432 + 984 = 97416
Step 100: 97416 + 984 = 98400
Step 101: 98400 + 984 = 99384
Step 102: 99384 + 984 = 100368
Step 103: 100368 + 984 = 101352
Step 104: 101352 + 984 = 102336
Step 105: 102336 + 984 = 103320
Step 106: 103320 + 984 = 104304
Step 107: 104304 + 984 = 105288
Step 108: 105288 + 984 = 106272
Step 109: 106272 + 984 = 107256
Step 110: 107256 + 984 = 108240
Step 111: 108240 + 984 = 109224
Step 112: 109224 + 984 = 110208
Step 113: 110208 + 984 = 111192
Step 114: 111192 + 984 = 112176
Step 115: 112176 + 984 = 113160
Step 116: 113160 + 984 = 114144
Step 117: 114144 + 984 = 115128
Step 118: 115128 + 984 = 116112
Step 119: 116112 + 984 = 117096
Step 120: 117096 + 984 = 118080
Step 121: 118080 + 984 = 119064
Step 122: 119064 + 984 = 120048
Step 123: 120048 + 984 = 121032
Step 124: 121032 + 984 = 122016
Step 125: 122016 + 984 = 123000
Step 126: 123000 + 984 = 123984
Step 127: 123984 + 984 = 124968
Step 128: 124968 + 984 = 125952
Step 129: 125952 + 984 = 126936
Step 130: 126936 + 984 = 127920
Step 131: 127920 + 984 = 128904
Step 132: 128904 + 984 = 129888
Step 133: 129888 + 984 = 130872
Step 134: 130872 + 984 = 131856
Step 135: 131856 + 984 = 132840
Step 136: 132840 + 984 = 133824
Step 137: 133824 + 984 = 134808
Step 138: 134808 + 984 = 135792
Step 139: 135792 + 984 = 136776
Step 140: 136776 + 984 = 137760
Step 141: 137760 + 984 = 138744
Step 142: 138744 + 984 = 139728
Step 143: 139728 + 984 = 140712
Step 144: 140712 + 984 = 141696
Step 145: 141696 + 984 = 142680
Step 146: 142680 + 984 = 143664
Step 147: 143664 + 984 = 144648
Step 148: 144648 + 984 = 145632
Step 149: 145632 + 984 = 146616
Step 150: 146616 + 984 = 147600
Step 151: 147600 + 984 = 148584
Step 152: 148584 + 984 = 149568
Step 153: 149568 + 984 = 150552
Step 154: 150552 + 984 = 151536
Step 155: 151536 + 984 = 152520
Step 156: 152520 + 984 = 153504
Step 157: 153504 + 984 = 154488
Step 158: 154488 + 984 = 155472
Step 159: 155472 + 984 = 156456
Step 160: 156456 + 984 = 157440
Step 161: 157440 + 984 = 158424
Step 162: 158424 + 984 = 159408
Step 163: 159408 + 984 = 160392
Step 164: 160392 + 984 = 161376
Step 165: 161376 + 984 = 162360
Step 166: 162360 + 984 = 163344
Step 167: 163344 + 984 = 164328
Step 168: 164328 + 984 = 165312
Step 169: 165312 + 984 = 166296
Step 170: 166296 + 984 = 167280
Step 171: 167280 + 984 = 168264
Step 172: 168264 + 984 = 169248
Step 173: 169248 + 984 = 170232
Step 174: 170232 + 984 = 171216
Step 175: 171216 + 984 = 172200
Step 176: 172200 + 984 = 173184
Step 177: 173184 + 984 = 174168
Step 178: 174168 + 984 = 175152
Step 179: 175152 + 984 = 176136
Step 180: 176136 + 984 = 177120
Step 181: 177120 + 984 = 178104
Step 182: 178104 + 984 = 179088
Step 183: 179088 + 984 = 180072
Step 184: 180072 + 984 = 181056
Step 185: 181056 + 984 = 182040
Step 186: 182040 + 984 = 183024
Step 187: 183024 + 984 = 184008
Step 188: 184008 + 984 = 184992
Step 189: 184992 + 984 = 185976
Step 190: 185976 + 984 = 186960
Step 191: 186960 + 984 = 187944
Step 192: 187944 + 984 = 188928
Step 193: 188928 + 984 = 189912
Step 194: 189912 + 984 = 190896
Step 195: 190896 + 984 = 191880
Step 196: 191880 + 984 = 192864
Step 197: 192864 + 984 = 193848
Step 198: 193848 + 984 = 194832
Step 199: 194832 + 984 = 195816
Step 200: 195816 + 984 = 196800
Step 201: 196800 + 984 = 197784
Step 202: 197784 + 984 = 198768
Step 203: 198768 + 984 = 199752
Step 204: 199752 + 984 = 200736
Step 205: 200736 + 984 = 201720
Step 206: 201720 + 984 = 202704
Step 207: 202704 + 984 = 203688
Step 208: 203688 + 984 = 204672
Step 209: 204672 + 984 = 205656
Step 210: 205656 + 984 = 206640
Step 211: 206640 + 984 = 207624
Step 212: 207624 + 984 = 208608
Step 213: 208608 + 984 = 209592
Step 214: 209592 + 984 = 210576
Step 215: 210576 + 984 = 211560
Step 216: 211560 + 984 = 212544
Step 217: 212544 + 984 = 213528
Step 218: 213528 + 984 = 214512
Step 219: 214512 + 984 = 215496
Step 220: 215496 + 984 = 216480
Step 221: 216480 + 984 = 217464
Step 222: 217464 + 984 = 218448
Step 223: 218448 + 984 = 219432
Step 224: 219432 + 984 = 220416
Step 225: 220416 + 984 = 221400
Step 226: 221400 + 984 = 222384
Step 227: 222384 + 984 = 223368
Step 228: 223368 + 984 = 224352
Step 229: 224352 + 984 = 225336
Step 230: 225336 + 984 = 226320
Step 231: 226320 + 984 = 227304
Step 232: 227304 + 984 = 228288
Step 233: 228288 + 984 = 229272
Step 234: 229272 + 984 = 230256
Step 235: 230256 + 984 = 231240
Step 236: 231240 + 984 = 232224
Step 237: 232224 + 984 = 233208
Step 238: 233208 + 984 = 234192
Step 239: 234192 + 984 = 235176
Step 240: 235176 + 984 = 236160
Step 241: 236160 + 984 = 237144
Step 242: 237144 + 984 = 238128
Step 243: 238128 + 984 = 239112
Step 244: 239112 + 984 = 240096
Step 245: 240096 + 984 = 241080
Step 246: 241080 + 984 = 242064
Step 247: 242064 + 984 = 243048
Step 248: 243048 + 984 = 244032
Step 249: 244032 + 984 = 245016
Step 250: 245016 + 984 = 246000
Step 251: 246000 + 984 = 246984
Step 252: 246984 + 984 = 247968
Step 253: 247968 + 984 = 248952
Step 254: 248952 + 984 = 249936
Step 255: 249936 + 984 = 250920
Step 256: 250920 + 984 = 251904
Step 257: 251904 + 984 = 252888
Step 258: 252888 + 984 = 253872
Step 259: 253872 + 984 = 254856
Step 260: 254856 + 984 = 255840
Step 261: 255840 + 984 = 256824
Step 262: 256824 + 984 = 257808
Step 263: 257808 + 984 = 258792
Step 264: 258792 + 984 = 259776
Step 265: 259776 + 984 = 260760
Step 266: 260760 + 984 = 261744
Step 267: 261744 + 984 = 262728
Step 268: 262728 + 984 = 263712
Step 269: 263712 + 984 = 264696
Step 270: 264696 + 984 = 265680
Step 271: 265680 + 984 = 266664
Step 272: 266664 + 984 = 267648
Step 273: 267648 + 984 = 268632
Step 274: 268632 + 984 = 269616
Step 275: 269616 + 984 = 270600
Step 276: 270600 + 984 = 271584
Step 277: 271584 + 984 = 272568
Step 278: 272568 + 984 = 273552
Step 279: 273552 + 984 = 274536
Step 280: 274536 + 984 = 275520
Step 281: 275520 + 984 = 276504
Step 282: 276504 + 984 = 277488
Step 283: 277488 + 984 = 278472
Step 284: 278472 + 984 = 279456
Step 285: 279456 + 984 = 280440
Step 286: 280440 + 984 = 281424
Step 287: 281424 + 984 = 282408
Step 288: 282408 + 984 = 283392
Step 289: 283392 + 984 = 284376
Step 290: 284376 + 984 = 285360
Step 291: 285360 + 984 = 286344
Step 292: 286344 + 984 = 287328
Step 293: 287328 + 984 = 288312
Step 294: 288312 + 984 = 289296
Step 295: 289296 + 984 = 290280
Step 296: 290280 + 984 = 291264
Step 297: 291264 + 984 = 292248
Step 298: 292248 + 984 = 293232
Step 299: 293232 + 984 = 294216
Step 300: 294216 + 984 = 295200
Step 301: 295200 + 984 = 296184
Step 302: 296184 + 984 = 297168
Step 303: 297168 + 984 = 298152
Step 304: 298152 + 984 = 299136
Step 305: 299136 + 984 = 300120
Step 306: 300120 + 984 = 301104
Step 307: 301104 + 984 = 302088
Step 308: 302088 + 984 = 303072
Step 309: 303072 + 984 = 304056
Step 310: 304056 + 984 = 305040
Step 311: 305040 + 984 = 306024
Step 312: 306024 + 984 = 307008
Step 313: 307008 + 984 = 307992
Step 314: 307992 + 984 = 308976
Step 315: 308976 + 984 = 309960
Step 316: 309960 + 984 = 310944
Step 317: 310944 + 984 = 311928
Step 318: 311928 + 984 = 312912
Step 319: 312912 + 984 = 313896
Step 320: 313896 + 984 = 314880
Step 321: 314880 + 984 = 315864
Step 322: 315864 + 984 = 316848
Step 323: 316848 + 984 = 317832
Step 324: 317832 + 984 = 318816
Step 325: 318816 + 984 = 319800
Step 326: 319800 + 984 = 320784
Step 327: 320784 + 984 = 321768
Step 328: 321768 + 984 = 322752
Step 329: 322752 + 984 = 323736
Step 330: 323736 + 984 = 324720
Step 331: 324720 + 984 = 325704
Step 332: 325704 + 984 = 326688
Step 333: 326688 + 984 = 327672
Step 334: 327672 + 984 = 328656
Step 335: 328656 + 984 = 329640
Step 336: 329640 + 984 = 330624
Step 337: 330624 + 984 = 331608
Step 338: 331608 + 984 = 332592
Step 339: 332592 + 984 = 333576
Step 340: 333576 + 984 = 334560
Step 341: 334560 + 984 = 335544
Step 342: 335544 + 984 = 336528
Step 343: 336528 + 984 = 337512
Step 344: 337512 + 984 = 338496
Step 345: 338496 + 984 = 339480
Step 346: 339480 + 984 = 340464
Step 347: 340464 + 984 = 341448
Step 348: 341448 + 984 = 342432
Step 349: 342432 + 984 = 343416
Step 350: 343416 + 984 = 344400
Step 351: 344400 + 984 = 345384
Step 352: 345384 + 984 = 346368
Step 353: 346368 + 984 = 347352
Step 354: 347352 + 984 = 348336
Step 355: 348336 + 984 = 349320
Step 356: 349320 + 984 = 350304
Step 357: 350304 + 984 = 351288
Step 358: 351288 + 984 = 352272
Step 359: 352272 + 984 = 353256
Step 360: 353256 + 984 = 354240
Step 361: 354240 + 984 = 355224
Step 362: 355224 + 984 = 356208
Step 363: 356208 + 984 = 357192
Step 364: 357192 + 984 = 358176
Step 365: 358176 + 984 = 359160
Step 366: 359160 + 984 = 360144
Step 367: 360144 + 984 = 361128
Step 368: 361128 + 984 = 362112
Step 369: 362112 + 984 = 363096
Step 370: 363096 + 984 = 364080
Step 371: 364080 + 984 = 365064
Step 372: 365064 + 984 = 366048
Step 373: 366048 + 984 = 367032
Step 374: 367032 + 984 = 368016
Step 375: 368016 + 984 = 369000
Step 376: 369000 + 984 = 369984
Step 377: 369984 + 984 = 370968
Step 378: 370968 + 984 = 371952
Step 379: 371952 + 984 = 372936
Step 380: 372936 + 984 = 373920
Step 381: 373920 + 984 = 374904
Step 382: 374904 + 984 = 375888
Step 383: 375888 + 984 = 376872
Step 384: 376872 + 984 = 377856
Step 385: 377856 + 984 = 378840
Step 386: 378840 + 984 = 379824
Step 387: 379824 + 984 = 380808
Step 388: 380808 + 984 = 381792
Step 389: 381792 + 984 = 382776
Step 390: 382776 + 984 = 383760
Step 391: 383760 + 984 = 384744
Step 392: 384744 + 984 = 385728
Step 393: 385728 + 984 = 386712
Step 394: 386712 + 984 = 387696
Step 395: 387696 + 984 = 388680
Step 396: 388680 + 984 = 389664
Step 397: 389664 + 984 = 390648
Step 398: 390648 + 984 = 391632

So, 984*398 = 391632