OK, let's work through this together. We're starting with 443 and we're going to multiply it by 345, which means we add 443 to itself 345 times.
Step 1: 0 + 443 = 443
Step 2: 443 + 443 = 886
Step 3: 886 + 443 = 1329
Step 4: 1329 + 443 = 1772
Step 5: 1772 + 443 = 2215
Step 6: 2215 + 443 = 2658
Step 7: 2658 + 443 = 3101
Step 8: 3101 + 443 = 3544
Step 9: 3544 + 443 = 3987
Step 10: 3987 + 443 = 4430
Step 11: 4430 + 443 = 4873
Step 12: 4873 + 443 = 5316
Step 13: 5316 + 443 = 5759
Step 14: 5759 + 443 = 6202
Step 15: 6202 + 443 = 6645
Step 16: 6645 + 443 = 7088
Step 17: 7088 + 443 = 7531
Step 18: 7531 + 443 = 7974
Step 19: 7974 + 443 = 8417
Step 20: 8417 + 443 = 8860
Step 21: 8860 + 443 = 9303
Step 22: 9303 + 443 = 9746
Step 23: 9746 + 443 = 10189
Step 24: 10189 + 443 = 10632
Step 25: 10632 + 443 = 11075
Step 26: 11075 + 443 = 11518
Step 27: 11518 + 443 = 11961
Step 28: 11961 + 443 = 12404
Step 29: 12404 + 443 = 12847
Step 30: 12847 + 443 = 13290
Step 31: 13290 + 443 = 13733
Step 32: 13733 + 443 = 14176
Step 33: 14176 + 443 = 14619
Step 34: 14619 + 443 = 15062
Step 35: 15062 + 443 = 15505
Step 36: 15505 + 443 = 15948
Step 37: 15948 + 443 = 16391
Step 38: 16391 + 443 = 16834
Step 39: 16834 + 443 = 17277
Step 40: 17277 + 443 = 17720
Step 41: 17720 + 443 = 18163
Step 42: 18163 + 443 = 18606
Step 43: 18606 + 443 = 19049
Step 44: 19049 + 443 = 19492
Step 45: 19492 + 443 = 19935
Step 46: 19935 + 443 = 20378
Step 47: 20378 + 443 = 20821
Step 48: 20821 + 443 = 21264
Step 49: 21264 + 443 = 21707
Step 50: 21707 + 443 = 22150
Step 51: 22150 + 443 = 22593
Step 52: 22593 + 443 = 23036
Step 53: 23036 + 443 = 23479
Step 54: 23479 + 443 = 23922
Step 55: 23922 + 443 = 24365
Step 56: 24365 + 443 = 24808
Step 57: 24808 + 443 = 25251
Step 58: 25251 + 443 = 25694
Step 59: 25694 + 443 = 26137
Step 60: 26137 + 443 = 26580
Step 61: 26580 + 443 = 27023
Step 62: 27023 + 443 = 27466
Step 63: 27466 + 443 = 27909
Step 64: 27909 + 443 = 28352
Step 65: 28352 + 443 = 28795
Step 66: 28795 + 443 = 29238
Step 67: 29238 + 443 = 29681
Step 68: 29681 + 443 = 30124
Step 69: 30124 + 443 = 30567
Step 70: 30567 + 443 = 31010
Step 71: 31010 + 443 = 31453
Step 72: 31453 + 443 = 31896
Step 73: 31896 + 443 = 32339
Step 74: 32339 + 443 = 32782
Step 75: 32782 + 443 = 33225
Step 76: 33225 + 443 = 33668
Step 77: 33668 + 443 = 34111
Step 78: 34111 + 443 = 34554
Step 79: 34554 + 443 = 34997
Step 80: 34997 + 443 = 35440
Step 81: 35440 + 443 = 35883
Step 82: 35883 + 443 = 36326
Step 83: 36326 + 443 = 36769
Step 84: 36769 + 443 = 37212
Step 85: 37212 + 443 = 37655
Step 86: 37655 + 443 = 38098
Step 87: 38098 + 443 = 38541
Step 88: 38541 + 443 = 38984
Step 89: 38984 + 443 = 39427
Step 90: 39427 + 443 = 39870
Step 91: 39870 + 443 = 40313
Step 92: 40313 + 443 = 40756
Step 93: 40756 + 443 = 41199
Step 94: 41199 + 443 = 41642
Step 95: 41642 + 443 = 42085
Step 96: 42085 + 443 = 42528
Step 97: 42528 + 443 = 42971
Step 98: 42971 + 443 = 43414
Step 99: 43414 + 443 = 43857
Step 100: 43857 + 443 = 44300
Step 101: 44300 + 443 = 44743
Step 102: 44743 + 443 = 45186
Step 103: 45186 + 443 = 45629
Step 104: 45629 + 443 = 46072
Step 105: 46072 + 443 = 46515
Step 106: 46515 + 443 = 46958
Step 107: 46958 + 443 = 47401
Step 108: 47401 + 443 = 47844
Step 109: 47844 + 443 = 48287
Step 110: 48287 + 443 = 48730
Step 111: 48730 + 443 = 49173
Step 112: 49173 + 443 = 49616
Step 113: 49616 + 443 = 50059
Step 114: 50059 + 443 = 50502
Step 115: 50502 + 443 = 50945
Step 116: 50945 + 443 = 51388
Step 117: 51388 + 443 = 51831
Step 118: 51831 + 443 = 52274
Step 119: 52274 + 443 = 52717
Step 120: 52717 + 443 = 53160
Step 121: 53160 + 443 = 53603
Step 122: 53603 + 443 = 54046
Step 123: 54046 + 443 = 54489
Step 124: 54489 + 443 = 54932
Step 125: 54932 + 443 = 55375
Step 126: 55375 + 443 = 55818
Step 127: 55818 + 443 = 56261
Step 128: 56261 + 443 = 56704
Step 129: 56704 + 443 = 57147
Step 130: 57147 + 443 = 57590
Step 131: 57590 + 443 = 58033
Step 132: 58033 + 443 = 58476
Step 133: 58476 + 443 = 58919
Step 134: 58919 + 443 = 59362
Step 135: 59362 + 443 = 59805
Step 136: 59805 + 443 = 60248
Step 137: 60248 + 443 = 60691
Step 138: 60691 + 443 = 61134
Step 139: 61134 + 443 = 61577
Step 140: 61577 + 443 = 62020
Step 141: 62020 + 443 = 62463
Step 142: 62463 + 443 = 62906
Step 143: 62906 + 443 = 63349
Step 144: 63349 + 443 = 63792
Step 145: 63792 + 443 = 64235
Step 146: 64235 + 443 = 64678
Step 147: 64678 + 443 = 65121
Step 148: 65121 + 443 = 65564
Step 149: 65564 + 443 = 66007
Step 150: 66007 + 443 = 66450
Step 151: 66450 + 443 = 66893
Step 152: 66893 + 443 = 67336
Step 153: 67336 + 443 = 67779
Step 154: 67779 + 443 = 68222
Step 155: 68222 + 443 = 68665
Step 156: 68665 + 443 = 69108
Step 157: 69108 + 443 = 69551
Step 158: 69551 + 443 = 69994
Step 159: 69994 + 443 = 70437
Step 160: 70437 + 443 = 70880
Step 161: 70880 + 443 = 71323
Step 162: 71323 + 443 = 71766
Step 163: 71766 + 443 = 72209
Step 164: 72209 + 443 = 72652
Step 165: 72652 + 443 = 73095
Step 166: 73095 + 443 = 73538
Step 167: 73538 + 443 = 73981
Step 168: 73981 + 443 = 74424
Step 169: 74424 + 443 = 74867
Step 170: 74867 + 443 = 75310
Step 171: 75310 + 443 = 75753
Step 172: 75753 + 443 = 76196
Step 173: 76196 + 443 = 76639
Step 174: 76639 + 443 = 77082
Step 175: 77082 + 443 = 77525
Step 176: 77525 + 443 = 77968
Step 177: 77968 + 443 = 78411
Step 178: 78411 + 443 = 78854
Step 179: 78854 + 443 = 79297
Step 180: 79297 + 443 = 79740
Step 181: 79740 + 443 = 80183
Step 182: 80183 + 443 = 80626
Step 183: 80626 + 443 = 81069
Step 184: 81069 + 443 = 81512
Step 185: 81512 + 443 = 81955
Step 186: 81955 + 443 = 82398
Step 187: 82398 + 443 = 82841
Step 188: 82841 + 443 = 83284
Step 189: 83284 + 443 = 83727
Step 190: 83727 + 443 = 84170
Step 191: 84170 + 443 = 84613
Step 192: 84613 + 443 = 85056
Step 193: 85056 + 443 = 85499
Step 194: 85499 + 443 = 85942
Step 195: 85942 + 443 = 86385
Step 196: 86385 + 443 = 86828
Step 197: 86828 + 443 = 87271
Step 198: 87271 + 443 = 87714
Step 199: 87714 + 443 = 88157
Step 200: 88157 + 443 = 88600
Step 201: 88600 + 443 = 89043
Step 202: 89043 + 443 = 89486
Step 203: 89486 + 443 = 89929
Step 204: 89929 + 443 = 90372
Step 205: 90372 + 443 = 90815
Step 206: 90815 + 443 = 91258
Step 207: 91258 + 443 = 91701
Step 208: 91701 + 443 = 92144
Step 209: 92144 + 443 = 92587
Step 210: 92587 + 443 = 93030
Step 211: 93030 + 443 = 93473
Step 212: 93473 + 443 = 93916
Step 213: 93916 + 443 = 94359
Step 214: 94359 + 443 = 94802
Step 215: 94802 + 443 = 95245
Step 216: 95245 + 443 = 95688
Step 217: 95688 + 443 = 96131
Step 218: 96131 + 443 = 96574
Step 219: 96574 + 443 = 97017
Step 220: 97017 + 443 = 97460
Step 221: 97460 + 443 = 97903
Step 222: 97903 + 443 = 98346
Step 223: 98346 + 443 = 98789
Step 224: 98789 + 443 = 99232
Step 225: 99232 + 443 = 99675
Step 226: 99675 + 443 = 100118
Step 227: 100118 + 443 = 100561
Step 228: 100561 + 443 = 101004
Step 229: 101004 + 443 = 101447
Step 230: 101447 + 443 = 101890
Step 231: 101890 + 443 = 102333
Step 232: 102333 + 443 = 102776
Step 233: 102776 + 443 = 103219
Step 234: 103219 + 443 = 103662
Step 235: 103662 + 443 = 104105
Step 236: 104105 + 443 = 104548
Step 237: 104548 + 443 = 104991
Step 238: 104991 + 443 = 105434
Step 239: 105434 + 443 = 105877
Step 240: 105877 + 443 = 106320
Step 241: 106320 + 443 = 106763
Step 242: 106763 + 443 = 107206
Step 243: 107206 + 443 = 107649
Step 244: 107649 + 443 = 108092
Step 245: 108092 + 443 = 108535
Step 246: 108535 + 443 = 108978
Step 247: 108978 + 443 = 109421
Step 248: 109421 + 443 = 109864
Step 249: 109864 + 443 = 110307
Step 250: 110307 + 443 = 110750
Step 251: 110750 + 443 = 111193
Step 252: 111193 + 443 = 111636
Step 253: 111636 + 443 = 112079
Step 254: 112079 + 443 = 112522
Step 255: 112522 + 443 = 112965
Step 256: 112965 + 443 = 113408
Step 257: 113408 + 443 = 113851
Step 258: 113851 + 443 = 114294
Step 259: 114294 + 443 = 114737
Step 260: 114737 + 443 = 115180
Step 261: 115180 + 443 = 115623
Step 262: 115623 + 443 = 116066
Step 263: 116066 + 443 = 116509
Step 264: 116509 + 443 = 116952
Step 265: 116952 + 443 = 117395
Step 266: 117395 + 443 = 117838
Step 267: 117838 + 443 = 118281
Step 268: 118281 + 443 = 118724
Step 269: 118724 + 443 = 119167
Step 270: 119167 + 443 = 119610
Step 271: 119610 + 443 = 120053
Step 272: 120053 + 443 = 120496
Step 273: 120496 + 443 = 120939
Step 274: 120939 + 443 = 121382
Step 275: 121382 + 443 = 121825
Step 276: 121825 + 443 = 122268
Step 277: 122268 + 443 = 122711
Step 278: 122711 + 443 = 123154
Step 279: 123154 + 443 = 123597
Step 280: 123597 + 443 = 124040
Step 281: 124040 + 443 = 124483
Step 282: 124483 + 443 = 124926
Step 283: 124926 + 443 = 125369
Step 284: 125369 + 443 = 125812
Step 285: 125812 + 443 = 126255
Step 286: 126255 + 443 = 126698
Step 287: 126698 + 443 = 127141
Step 288: 127141 + 443 = 127584
Step 289: 127584 + 443 = 128027
Step 290: 128027 + 443 = 128470
Step 291: 128470 + 443 = 128913
Step 292: 128913 + 443 = 129356
Step 293: 129356 + 443 = 129799
Step 294: 129799 + 443 = 130242
Step 295: 130242 + 443 = 130685
Step 296: 130685 + 443 = 131128
Step 297: 131128 + 443 = 131571
Step 298: 131571 + 443 = 132014
Step 299: 132014 + 443 = 132457
Step 300: 132457 + 443 = 132900
Step 301: 132900 + 443 = 133343
Step 302: 133343 + 443 = 133786
Step 303: 133786 + 443 = 134229
Step 304: 134229 + 443 = 134672
Step 305: 134672 + 443 = 135115
Step 306: 135115 + 443 = 135558
Step 307: 135558 + 443 = 136001
Step 308: 136001 + 443 = 136444
Step 309: 136444 + 443 = 136887
Step 310: 136887 + 443 = 137330
Step 311: 137330 + 443 = 137773
Step 312: 137773 + 443 = 138216
Step 313: 138216 + 443 = 138659
Step 314: 138659 + 443 = 139102
Step 315: 139102 + 443 = 139545
Step 316: 139545 + 443 = 139988
Step 317: 139988 + 443 = 140431
Step 318: 140431 + 443 = 140874
Step 319: 140874 + 443 = 141317
Step 320: 141317 + 443 = 141760
Step 321: 141760 + 443 = 142203
Step 322: 142203 + 443 = 142646
Step 323: 142646 + 443 = 143089
Step 324: 143089 + 443 = 143532
Step 325: 143532 + 443 = 143975
Step 326: 143975 + 443 = 144418
Step 327: 144418 + 443 = 144861
Step 328: 144861 + 443 = 145304
Step 329: 145304 + 443 = 145747
Step 330: 145747 + 443 = 146190
Step 331: 146190 + 443 = 146633
Step 332: 146633 + 443 = 147076
Step 333: 147076 + 443 = 147519
Step 334: 147519 + 443 = 147962
Step 335: 147962 + 443 = 148405
Step 336: 148405 + 443 = 148848
Step 337: 148848 + 443 = 149291
Step 338: 149291 + 443 = 149734
Step 339: 149734 + 443 = 150177
Step 340: 150177 + 443 = 150620
Step 341: 150620 + 443 = 151063
Step 342: 151063 + 443 = 151506
Step 343: 151506 + 443 = 151949
Step 344: 151949 + 443 = 152392
Step 345: 152392 + 443 = 152835

So, 443*345 = 152835