OK, let's work through this together. We're starting with 62 and we're going to multiply it by 42, which means we add 62 to itself 42 times.
Step 1: 0 + 62 = 62
Step 2: 62 + 62 = 124
Step 3: 124 + 62 = 186
Step 4: 186 + 62 = 248
Step 5: 248 + 62 = 310
Step 6: 310 + 62 = 372
Step 7: 372 + 62 = 434
Step 8: 434 + 62 = 496
Step 9: 496 + 62 = 558
Step 10: 558 + 62 = 620
Step 11: 620 + 62 = 682
Step 12: 682 + 62 = 744
Step 13: 744 + 62 = 806
Step 14: 806 + 62 = 868
Step 15: 868 + 62 = 930
Step 16: 930 + 62 = 992
Step 17: 992 + 62 = 1054
Step 18: 1054 + 62 = 1116
Step 19: 1116 + 62 = 1178
Step 20: 1178 + 62 = 1240
Step 21: 1240 + 62 = 1302
Step 22: 1302 + 62 = 1364
Step 23: 1364 + 62 = 1426
Step 24: 1426 + 62 = 1488
Step 25: 1488 + 62 = 1550
Step 26: 1550 + 62 = 1612
Step 27: 1612 + 62 = 1674
Step 28: 1674 + 62 = 1736
Step 29: 1736 + 62 = 1798
Step 30: 1798 + 62 = 1860
Step 31: 1860 + 62 = 1922
Step 32: 1922 + 62 = 1984
Step 33: 1984 + 62 = 2046
Step 34: 2046 + 62 = 2108
Step 35: 2108 + 62 = 2170
Step 36: 2170 + 62 = 2232
Step 37: 2232 + 62 = 2294
Step 38: 2294 + 62 = 2356
Step 39: 2356 + 62 = 2418
Step 40: 2418 + 62 = 2480
Step 41: 2480 + 62 = 2542
Step 42: 2542 + 62 = 2604

So, 62*42 = 2604