OK, let's work through this together. We're starting with 424 and we're going to multiply it by 385, which means we add 424 to itself 385 times.
Step 1: 0 + 424 = 424
Step 2: 424 + 424 = 848
Step 3: 848 + 424 = 1272
Step 4: 1272 + 424 = 1696
Step 5: 1696 + 424 = 2120
Step 6: 2120 + 424 = 2544
Step 7: 2544 + 424 = 2968
Step 8: 2968 + 424 = 3392
Step 9: 3392 + 424 = 3816
Step 10: 3816 + 424 = 4240
Step 11: 4240 + 424 = 4664
Step 12: 4664 + 424 = 5088
Step 13: 5088 + 424 = 5512
Step 14: 5512 + 424 = 5936
Step 15: 5936 + 424 = 6360
Step 16: 6360 + 424 = 6784
Step 17: 6784 + 424 = 7208
Step 18: 7208 + 424 = 7632
Step 19: 7632 + 424 = 8056
Step 20: 8056 + 424 = 8480
Step 21: 8480 + 424 = 8904
Step 22: 8904 + 424 = 9328
Step 23: 9328 + 424 = 9752
Step 24: 9752 + 424 = 10176
Step 25: 10176 + 424 = 10600
Step 26: 10600 + 424 = 11024
Step 27: 11024 + 424 = 11448
Step 28: 11448 + 424 = 11872
Step 29: 11872 + 424 = 12296
Step 30: 12296 + 424 = 12720
Step 31: 12720 + 424 = 13144
Step 32: 13144 + 424 = 13568
Step 33: 13568 + 424 = 13992
Step 34: 13992 + 424 = 14416
Step 35: 14416 + 424 = 14840
Step 36: 14840 + 424 = 15264
Step 37: 15264 + 424 = 15688
Step 38: 15688 + 424 = 16112
Step 39: 16112 + 424 = 16536
Step 40: 16536 + 424 = 16960
Step 41: 16960 + 424 = 17384
Step 42: 17384 + 424 = 17808
Step 43: 17808 + 424 = 18232
Step 44: 18232 + 424 = 18656
Step 45: 18656 + 424 = 19080
Step 46: 19080 + 424 = 19504
Step 47: 19504 + 424 = 19928
Step 48: 19928 + 424 = 20352
Step 49: 20352 + 424 = 20776
Step 50: 20776 + 424 = 21200
Step 51: 21200 + 424 = 21624
Step 52: 21624 + 424 = 22048
Step 53: 22048 + 424 = 22472
Step 54: 22472 + 424 = 22896
Step 55: 22896 + 424 = 23320
Step 56: 23320 + 424 = 23744
Step 57: 23744 + 424 = 24168
Step 58: 24168 + 424 = 24592
Step 59: 24592 + 424 = 25016
Step 60: 25016 + 424 = 25440
Step 61: 25440 + 424 = 25864
Step 62: 25864 + 424 = 26288
Step 63: 26288 + 424 = 26712
Step 64: 26712 + 424 = 27136
Step 65: 27136 + 424 = 27560
Step 66: 27560 + 424 = 27984
Step 67: 27984 + 424 = 28408
Step 68: 28408 + 424 = 28832
Step 69: 28832 + 424 = 29256
Step 70: 29256 + 424 = 29680
Step 71: 29680 + 424 = 30104
Step 72: 30104 + 424 = 30528
Step 73: 30528 + 424 = 30952
Step 74: 30952 + 424 = 31376
Step 75: 31376 + 424 = 31800
Step 76: 31800 + 424 = 32224
Step 77: 32224 + 424 = 32648
Step 78: 32648 + 424 = 33072
Step 79: 33072 + 424 = 33496
Step 80: 33496 + 424 = 33920
Step 81: 33920 + 424 = 34344
Step 82: 34344 + 424 = 34768
Step 83: 34768 + 424 = 35192
Step 84: 35192 + 424 = 35616
Step 85: 35616 + 424 = 36040
Step 86: 36040 + 424 = 36464
Step 87: 36464 + 424 = 36888
Step 88: 36888 + 424 = 37312
Step 89: 37312 + 424 = 37736
Step 90: 37736 + 424 = 38160
Step 91: 38160 + 424 = 38584
Step 92: 38584 + 424 = 39008
Step 93: 39008 + 424 = 39432
Step 94: 39432 + 424 = 39856
Step 95: 39856 + 424 = 40280
Step 96: 40280 + 424 = 40704
Step 97: 40704 + 424 = 41128
Step 98: 41128 + 424 = 41552
Step 99: 41552 + 424 = 41976
Step 100: 41976 + 424 = 42400
Step 101: 42400 + 424 = 42824
Step 102: 42824 + 424 = 43248
Step 103: 43248 + 424 = 43672
Step 104: 43672 + 424 = 44096
Step 105: 44096 + 424 = 44520
Step 106: 44520 + 424 = 44944
Step 107: 44944 + 424 = 45368
Step 108: 45368 + 424 = 45792
Step 109: 45792 + 424 = 46216
Step 110: 46216 + 424 = 46640
Step 111: 46640 + 424 = 47064
Step 112: 47064 + 424 = 47488
Step 113: 47488 + 424 = 47912
Step 114: 47912 + 424 = 48336
Step 115: 48336 + 424 = 48760
Step 116: 48760 + 424 = 49184
Step 117: 49184 + 424 = 49608
Step 118: 49608 + 424 = 50032
Step 119: 50032 + 424 = 50456
Step 120: 50456 + 424 = 50880
Step 121: 50880 + 424 = 51304
Step 122: 51304 + 424 = 51728
Step 123: 51728 + 424 = 52152
Step 124: 52152 + 424 = 52576
Step 125: 52576 + 424 = 53000
Step 126: 53000 + 424 = 53424
Step 127: 53424 + 424 = 53848
Step 128: 53848 + 424 = 54272
Step 129: 54272 + 424 = 54696
Step 130: 54696 + 424 = 55120
Step 131: 55120 + 424 = 55544
Step 132: 55544 + 424 = 55968
Step 133: 55968 + 424 = 56392
Step 134: 56392 + 424 = 56816
Step 135: 56816 + 424 = 57240
Step 136: 57240 + 424 = 57664
Step 137: 57664 + 424 = 58088
Step 138: 58088 + 424 = 58512
Step 139: 58512 + 424 = 58936
Step 140: 58936 + 424 = 59360
Step 141: 59360 + 424 = 59784
Step 142: 59784 + 424 = 60208
Step 143: 60208 + 424 = 60632
Step 144: 60632 + 424 = 61056
Step 145: 61056 + 424 = 61480
Step 146: 61480 + 424 = 61904
Step 147: 61904 + 424 = 62328
Step 148: 62328 + 424 = 62752
Step 149: 62752 + 424 = 63176
Step 150: 63176 + 424 = 63600
Step 151: 63600 + 424 = 64024
Step 152: 64024 + 424 = 64448
Step 153: 64448 + 424 = 64872
Step 154: 64872 + 424 = 65296
Step 155: 65296 + 424 = 65720
Step 156: 65720 + 424 = 66144
Step 157: 66144 + 424 = 66568
Step 158: 66568 + 424 = 66992
Step 159: 66992 + 424 = 67416
Step 160: 67416 + 424 = 67840
Step 161: 67840 + 424 = 68264
Step 162: 68264 + 424 = 68688
Step 163: 68688 + 424 = 69112
Step 164: 69112 + 424 = 69536
Step 165: 69536 + 424 = 69960
Step 166: 69960 + 424 = 70384
Step 167: 70384 + 424 = 70808
Step 168: 70808 + 424 = 71232
Step 169: 71232 + 424 = 71656
Step 170: 71656 + 424 = 72080
Step 171: 72080 + 424 = 72504
Step 172: 72504 + 424 = 72928
Step 173: 72928 + 424 = 73352
Step 174: 73352 + 424 = 73776
Step 175: 73776 + 424 = 74200
Step 176: 74200 + 424 = 74624
Step 177: 74624 + 424 = 75048
Step 178: 75048 + 424 = 75472
Step 179: 75472 + 424 = 75896
Step 180: 75896 + 424 = 76320
Step 181: 76320 + 424 = 76744
Step 182: 76744 + 424 = 77168
Step 183: 77168 + 424 = 77592
Step 184: 77592 + 424 = 78016
Step 185: 78016 + 424 = 78440
Step 186: 78440 + 424 = 78864
Step 187: 78864 + 424 = 79288
Step 188: 79288 + 424 = 79712
Step 189: 79712 + 424 = 80136
Step 190: 80136 + 424 = 80560
Step 191: 80560 + 424 = 80984
Step 192: 80984 + 424 = 81408
Step 193: 81408 + 424 = 81832
Step 194: 81832 + 424 = 82256
Step 195: 82256 + 424 = 82680
Step 196: 82680 + 424 = 83104
Step 197: 83104 + 424 = 83528
Step 198: 83528 + 424 = 83952
Step 199: 83952 + 424 = 84376
Step 200: 84376 + 424 = 84800
Step 201: 84800 + 424 = 85224
Step 202: 85224 + 424 = 85648
Step 203: 85648 + 424 = 86072
Step 204: 86072 + 424 = 86496
Step 205: 86496 + 424 = 86920
Step 206: 86920 + 424 = 87344
Step 207: 87344 + 424 = 87768
Step 208: 87768 + 424 = 88192
Step 209: 88192 + 424 = 88616
Step 210: 88616 + 424 = 89040
Step 211: 89040 + 424 = 89464
Step 212: 89464 + 424 = 89888
Step 213: 89888 + 424 = 90312
Step 214: 90312 + 424 = 90736
Step 215: 90736 + 424 = 91160
Step 216: 91160 + 424 = 91584
Step 217: 91584 + 424 = 92008
Step 218: 92008 + 424 = 92432
Step 219: 92432 + 424 = 92856
Step 220: 92856 + 424 = 93280
Step 221: 93280 + 424 = 93704
Step 222: 93704 + 424 = 94128
Step 223: 94128 + 424 = 94552
Step 224: 94552 + 424 = 94976
Step 225: 94976 + 424 = 95400
Step 226: 95400 + 424 = 95824
Step 227: 95824 + 424 = 96248
Step 228: 96248 + 424 = 96672
Step 229: 96672 + 424 = 97096
Step 230: 97096 + 424 = 97520
Step 231: 97520 + 424 = 97944
Step 232: 97944 + 424 = 98368
Step 233: 98368 + 424 = 98792
Step 234: 98792 + 424 = 99216
Step 235: 99216 + 424 = 99640
Step 236: 99640 + 424 = 100064
Step 237: 100064 + 424 = 100488
Step 238: 100488 + 424 = 100912
Step 239: 100912 + 424 = 101336
Step 240: 101336 + 424 = 101760
Step 241: 101760 + 424 = 102184
Step 242: 102184 + 424 = 102608
Step 243: 102608 + 424 = 103032
Step 244: 103032 + 424 = 103456
Step 245: 103456 + 424 = 103880
Step 246: 103880 + 424 = 104304
Step 247: 104304 + 424 = 104728
Step 248: 104728 + 424 = 105152
Step 249: 105152 + 424 = 105576
Step 250: 105576 + 424 = 106000
Step 251: 106000 + 424 = 106424
Step 252: 106424 + 424 = 106848
Step 253: 106848 + 424 = 107272
Step 254: 107272 + 424 = 107696
Step 255: 107696 + 424 = 108120
Step 256: 108120 + 424 = 108544
Step 257: 108544 + 424 = 108968
Step 258: 108968 + 424 = 109392
Step 259: 109392 + 424 = 109816
Step 260: 109816 + 424 = 110240
Step 261: 110240 + 424 = 110664
Step 262: 110664 + 424 = 111088
Step 263: 111088 + 424 = 111512
Step 264: 111512 + 424 = 111936
Step 265: 111936 + 424 = 112360
Step 266: 112360 + 424 = 112784
Step 267: 112784 + 424 = 113208
Step 268: 113208 + 424 = 113632
Step 269: 113632 + 424 = 114056
Step 270: 114056 + 424 = 114480
Step 271: 114480 + 424 = 114904
Step 272: 114904 + 424 = 115328
Step 273: 115328 + 424 = 115752
Step 274: 115752 + 424 = 116176
Step 275: 116176 + 424 = 116600
Step 276: 116600 + 424 = 117024
Step 277: 117024 + 424 = 117448
Step 278: 117448 + 424 = 117872
Step 279: 117872 + 424 = 118296
Step 280: 118296 + 424 = 118720
Step 281: 118720 + 424 = 119144
Step 282: 119144 + 424 = 119568
Step 283: 119568 + 424 = 119992
Step 284: 119992 + 424 = 120416
Step 285: 120416 + 424 = 120840
Step 286: 120840 + 424 = 121264
Step 287: 121264 + 424 = 121688
Step 288: 121688 + 424 = 122112
Step 289: 122112 + 424 = 122536
Step 290: 122536 + 424 = 122960
Step 291: 122960 + 424 = 123384
Step 292: 123384 + 424 = 123808
Step 293: 123808 + 424 = 124232
Step 294: 124232 + 424 = 124656
Step 295: 124656 + 424 = 125080
Step 296: 125080 + 424 = 125504
Step 297: 125504 + 424 = 125928
Step 298: 125928 + 424 = 126352
Step 299: 126352 + 424 = 126776
Step 300: 126776 + 424 = 127200
Step 301: 127200 + 424 = 127624
Step 302: 127624 + 424 = 128048
Step 303: 128048 + 424 = 128472
Step 304: 128472 + 424 = 128896
Step 305: 128896 + 424 = 129320
Step 306: 129320 + 424 = 129744
Step 307: 129744 + 424 = 130168
Step 308: 130168 + 424 = 130592
Step 309: 130592 + 424 = 131016
Step 310: 131016 + 424 = 131440
Step 311: 131440 + 424 = 131864
Step 312: 131864 + 424 = 132288
Step 313: 132288 + 424 = 132712
Step 314: 132712 + 424 = 133136
Step 315: 133136 + 424 = 133560
Step 316: 133560 + 424 = 133984
Step 317: 133984 + 424 = 134408
Step 318: 134408 + 424 = 134832
Step 319: 134832 + 424 = 135256
Step 320: 135256 + 424 = 135680
Step 321: 135680 + 424 = 136104
Step 322: 136104 + 424 = 136528
Step 323: 136528 + 424 = 136952
Step 324: 136952 + 424 = 137376
Step 325: 137376 + 424 = 137800
Step 326: 137800 + 424 = 138224
Step 327: 138224 + 424 = 138648
Step 328: 138648 + 424 = 139072
Step 329: 139072 + 424 = 139496
Step 330: 139496 + 424 = 139920
Step 331: 139920 + 424 = 140344
Step 332: 140344 + 424 = 140768
Step 333: 140768 + 424 = 141192
Step 334: 141192 + 424 = 141616
Step 335: 141616 + 424 = 142040
Step 336: 142040 + 424 = 142464
Step 337: 142464 + 424 = 142888
Step 338: 142888 + 424 = 143312
Step 339: 143312 + 424 = 143736
Step 340: 143736 + 424 = 144160
Step 341: 144160 + 424 = 144584
Step 342: 144584 + 424 = 145008
Step 343: 145008 + 424 = 145432
Step 344: 145432 + 424 = 145856
Step 345: 145856 + 424 = 146280
Step 346: 146280 + 424 = 146704
Step 347: 146704 + 424 = 147128
Step 348: 147128 + 424 = 147552
Step 349: 147552 + 424 = 147976
Step 350: 147976 + 424 = 148400
Step 351: 148400 + 424 = 148824
Step 352: 148824 + 424 = 149248
Step 353: 149248 + 424 = 149672
Step 354: 149672 + 424 = 150096
Step 355: 150096 + 424 = 150520
Step 356: 150520 + 424 = 150944
Step 357: 150944 + 424 = 151368
Step 358: 151368 + 424 = 151792
Step 359: 151792 + 424 = 152216
Step 360: 152216 + 424 = 152640
Step 361: 152640 + 424 = 153064
Step 362: 153064 + 424 = 153488
Step 363: 153488 + 424 = 153912
Step 364: 153912 + 424 = 154336
Step 365: 154336 + 424 = 154760
Step 366: 154760 + 424 = 155184
Step 367: 155184 + 424 = 155608
Step 368: 155608 + 424 = 156032
Step 369: 156032 + 424 = 156456
Step 370: 156456 + 424 = 156880
Step 371: 156880 + 424 = 157304
Step 372: 157304 + 424 = 157728
Step 373: 157728 + 424 = 158152
Step 374: 158152 + 424 = 158576
Step 375: 158576 + 424 = 159000
Step 376: 159000 + 424 = 159424
Step 377: 159424 + 424 = 159848
Step 378: 159848 + 424 = 160272
Step 379: 160272 + 424 = 160696
Step 380: 160696 + 424 = 161120
Step 381: 161120 + 424 = 161544
Step 382: 161544 + 424 = 161968
Step 383: 161968 + 424 = 162392
Step 384: 162392 + 424 = 162816
Step 385: 162816 + 424 = 163240

So, 424*385 = 163240