OK, let's work through this together. We're starting with 73 and we're going to multiply it by 248, which means we add 73 to itself 248 times.
Step 1: 0 + 73 = 73
Step 2: 73 + 73 = 146
Step 3: 146 + 73 = 219
Step 4: 219 + 73 = 292
Step 5: 292 + 73 = 365
Step 6: 365 + 73 = 438
Step 7: 438 + 73 = 511
Step 8: 511 + 73 = 584
Step 9: 584 + 73 = 657
Step 10: 657 + 73 = 730
Step 11: 730 + 73 = 803
Step 12: 803 + 73 = 876
Step 13: 876 + 73 = 949
Step 14: 949 + 73 = 1022
Step 15: 1022 + 73 = 1095
Step 16: 1095 + 73 = 1168
Step 17: 1168 + 73 = 1241
Step 18: 1241 + 73 = 1314
Step 19: 1314 + 73 = 1387
Step 20: 1387 + 73 = 1460
Step 21: 1460 + 73 = 1533
Step 22: 1533 + 73 = 1606
Step 23: 1606 + 73 = 1679
Step 24: 1679 + 73 = 1752
Step 25: 1752 + 73 = 1825
Step 26: 1825 + 73 = 1898
Step 27: 1898 + 73 = 1971
Step 28: 1971 + 73 = 2044
Step 29: 2044 + 73 = 2117
Step 30: 2117 + 73 = 2190
Step 31: 2190 + 73 = 2263
Step 32: 2263 + 73 = 2336
Step 33: 2336 + 73 = 2409
Step 34: 2409 + 73 = 2482
Step 35: 2482 + 73 = 2555
Step 36: 2555 + 73 = 2628
Step 37: 2628 + 73 = 2701
Step 38: 2701 + 73 = 2774
Step 39: 2774 + 73 = 2847
Step 40: 2847 + 73 = 2920
Step 41: 2920 + 73 = 2993
Step 42: 2993 + 73 = 3066
Step 43: 3066 + 73 = 3139
Step 44: 3139 + 73 = 3212
Step 45: 3212 + 73 = 3285
Step 46: 3285 + 73 = 3358
Step 47: 3358 + 73 = 3431
Step 48: 3431 + 73 = 3504
Step 49: 3504 + 73 = 3577
Step 50: 3577 + 73 = 3650
Step 51: 3650 + 73 = 3723
Step 52: 3723 + 73 = 3796
Step 53: 3796 + 73 = 3869
Step 54: 3869 + 73 = 3942
Step 55: 3942 + 73 = 4015
Step 56: 4015 + 73 = 4088
Step 57: 4088 + 73 = 4161
Step 58: 4161 + 73 = 4234
Step 59: 4234 + 73 = 4307
Step 60: 4307 + 73 = 4380
Step 61: 4380 + 73 = 4453
Step 62: 4453 + 73 = 4526
Step 63: 4526 + 73 = 4599
Step 64: 4599 + 73 = 4672
Step 65: 4672 + 73 = 4745
Step 66: 4745 + 73 = 4818
Step 67: 4818 + 73 = 4891
Step 68: 4891 + 73 = 4964
Step 69: 4964 + 73 = 5037
Step 70: 5037 + 73 = 5110
Step 71: 5110 + 73 = 5183
Step 72: 5183 + 73 = 5256
Step 73: 5256 + 73 = 5329
Step 74: 5329 + 73 = 5402
Step 75: 5402 + 73 = 5475
Step 76: 5475 + 73 = 5548
Step 77: 5548 + 73 = 5621
Step 78: 5621 + 73 = 5694
Step 79: 5694 + 73 = 5767
Step 80: 5767 + 73 = 5840
Step 81: 5840 + 73 = 5913
Step 82: 5913 + 73 = 5986
Step 83: 5986 + 73 = 6059
Step 84: 6059 + 73 = 6132
Step 85: 6132 + 73 = 6205
Step 86: 6205 + 73 = 6278
Step 87: 6278 + 73 = 6351
Step 88: 6351 + 73 = 6424
Step 89: 6424 + 73 = 6497
Step 90: 6497 + 73 = 6570
Step 91: 6570 + 73 = 6643
Step 92: 6643 + 73 = 6716
Step 93: 6716 + 73 = 6789
Step 94: 6789 + 73 = 6862
Step 95: 6862 + 73 = 6935
Step 96: 6935 + 73 = 7008
Step 97: 7008 + 73 = 7081
Step 98: 7081 + 73 = 7154
Step 99: 7154 + 73 = 7227
Step 100: 7227 + 73 = 7300
Step 101: 7300 + 73 = 7373
Step 102: 7373 + 73 = 7446
Step 103: 7446 + 73 = 7519
Step 104: 7519 + 73 = 7592
Step 105: 7592 + 73 = 7665
Step 106: 7665 + 73 = 7738
Step 107: 7738 + 73 = 7811
Step 108: 7811 + 73 = 7884
Step 109: 7884 + 73 = 7957
Step 110: 7957 + 73 = 8030
Step 111: 8030 + 73 = 8103
Step 112: 8103 + 73 = 8176
Step 113: 8176 + 73 = 8249
Step 114: 8249 + 73 = 8322
Step 115: 8322 + 73 = 8395
Step 116: 8395 + 73 = 8468
Step 117: 8468 + 73 = 8541
Step 118: 8541 + 73 = 8614
Step 119: 8614 + 73 = 8687
Step 120: 8687 + 73 = 8760
Step 121: 8760 + 73 = 8833
Step 122: 8833 + 73 = 8906
Step 123: 8906 + 73 = 8979
Step 124: 8979 + 73 = 9052
Step 125: 9052 + 73 = 9125
Step 126: 9125 + 73 = 9198
Step 127: 9198 + 73 = 9271
Step 128: 9271 + 73 = 9344
Step 129: 9344 + 73 = 9417
Step 130: 9417 + 73 = 9490
Step 131: 9490 + 73 = 9563
Step 132: 9563 + 73 = 9636
Step 133: 9636 + 73 = 9709
Step 134: 9709 + 73 = 9782
Step 135: 9782 + 73 = 9855
Step 136: 9855 + 73 = 9928
Step 137: 9928 + 73 = 10001
Step 138: 10001 + 73 = 10074
Step 139: 10074 + 73 = 10147
Step 140: 10147 + 73 = 10220
Step 141: 10220 + 73 = 10293
Step 142: 10293 + 73 = 10366
Step 143: 10366 + 73 = 10439
Step 144: 10439 + 73 = 10512
Step 145: 10512 + 73 = 10585
Step 146: 10585 + 73 = 10658
Step 147: 10658 + 73 = 10731
Step 148: 10731 + 73 = 10804
Step 149: 10804 + 73 = 10877
Step 150: 10877 + 73 = 10950
Step 151: 10950 + 73 = 11023
Step 152: 11023 + 73 = 11096
Step 153: 11096 + 73 = 11169
Step 154: 11169 + 73 = 11242
Step 155: 11242 + 73 = 11315
Step 156: 11315 + 73 = 11388
Step 157: 11388 + 73 = 11461
Step 158: 11461 + 73 = 11534
Step 159: 11534 + 73 = 11607
Step 160: 11607 + 73 = 11680
Step 161: 11680 + 73 = 11753
Step 162: 11753 + 73 = 11826
Step 163: 11826 + 73 = 11899
Step 164: 11899 + 73 = 11972
Step 165: 11972 + 73 = 12045
Step 166: 12045 + 73 = 12118
Step 167: 12118 + 73 = 12191
Step 168: 12191 + 73 = 12264
Step 169: 12264 + 73 = 12337
Step 170: 12337 + 73 = 12410
Step 171: 12410 + 73 = 12483
Step 172: 12483 + 73 = 12556
Step 173: 12556 + 73 = 12629
Step 174: 12629 + 73 = 12702
Step 175: 12702 + 73 = 12775
Step 176: 12775 + 73 = 12848
Step 177: 12848 + 73 = 12921
Step 178: 12921 + 73 = 12994
Step 179: 12994 + 73 = 13067
Step 180: 13067 + 73 = 13140
Step 181: 13140 + 73 = 13213
Step 182: 13213 + 73 = 13286
Step 183: 13286 + 73 = 13359
Step 184: 13359 + 73 = 13432
Step 185: 13432 + 73 = 13505
Step 186: 13505 + 73 = 13578
Step 187: 13578 + 73 = 13651
Step 188: 13651 + 73 = 13724
Step 189: 13724 + 73 = 13797
Step 190: 13797 + 73 = 13870
Step 191: 13870 + 73 = 13943
Step 192: 13943 + 73 = 14016
Step 193: 14016 + 73 = 14089
Step 194: 14089 + 73 = 14162
Step 195: 14162 + 73 = 14235
Step 196: 14235 + 73 = 14308
Step 197: 14308 + 73 = 14381
Step 198: 14381 + 73 = 14454
Step 199: 14454 + 73 = 14527
Step 200: 14527 + 73 = 14600
Step 201: 14600 + 73 = 14673
Step 202: 14673 + 73 = 14746
Step 203: 14746 + 73 = 14819
Step 204: 14819 + 73 = 14892
Step 205: 14892 + 73 = 14965
Step 206: 14965 + 73 = 15038
Step 207: 15038 + 73 = 15111
Step 208: 15111 + 73 = 15184
Step 209: 15184 + 73 = 15257
Step 210: 15257 + 73 = 15330
Step 211: 15330 + 73 = 15403
Step 212: 15403 + 73 = 15476
Step 213: 15476 + 73 = 15549
Step 214: 15549 + 73 = 15622
Step 215: 15622 + 73 = 15695
Step 216: 15695 + 73 = 15768
Step 217: 15768 + 73 = 15841
Step 218: 15841 + 73 = 15914
Step 219: 15914 + 73 = 15987
Step 220: 15987 + 73 = 16060
Step 221: 16060 + 73 = 16133
Step 222: 16133 + 73 = 16206
Step 223: 16206 + 73 = 16279
Step 224: 16279 + 73 = 16352
Step 225: 16352 + 73 = 16425
Step 226: 16425 + 73 = 16498
Step 227: 16498 + 73 = 16571
Step 228: 16571 + 73 = 16644
Step 229: 16644 + 73 = 16717
Step 230: 16717 + 73 = 16790
Step 231: 16790 + 73 = 16863
Step 232: 16863 + 73 = 16936
Step 233: 16936 + 73 = 17009
Step 234: 17009 + 73 = 17082
Step 235: 17082 + 73 = 17155
Step 236: 17155 + 73 = 17228
Step 237: 17228 + 73 = 17301
Step 238: 17301 + 73 = 17374
Step 239: 17374 + 73 = 17447
Step 240: 17447 + 73 = 17520
Step 241: 17520 + 73 = 17593
Step 242: 17593 + 73 = 17666
Step 243: 17666 + 73 = 17739
Step 244: 17739 + 73 = 17812
Step 245: 17812 + 73 = 17885
Step 246: 17885 + 73 = 17958
Step 247: 17958 + 73 = 18031
Step 248: 18031 + 73 = 18104

So, 73*248 = 18104