OK, let's crack this. We're given 93 and our task is to multiply it by 31. Essentially, we'll be adding 93 to itself 31 times.
Step 1: 0 + 93 = 93
Step 2: 93 + 93 = 186
Step 3: 186 + 93 = 279
Step 4: 279 + 93 = 372
Step 5: 372 + 93 = 465
Step 6: 465 + 93 = 558
Step 7: 558 + 93 = 651
Step 8: 651 + 93 = 744
Step 9: 744 + 93 = 837
Step 10: 837 + 93 = 930
Step 11: 930 + 93 = 1023
Step 12: 1023 + 93 = 1116
Step 13: 1116 + 93 = 1209
Step 14: 1209 + 93 = 1302
Step 15: 1302 + 93 = 1395
Step 16: 1395 + 93 = 1488
Step 17: 1488 + 93 = 1581
Step 18: 1581 + 93 = 1674
Step 19: 1674 + 93 = 1767
Step 20: 1767 + 93 = 1860
Step 21: 1860 + 93 = 1953
Step 22: 1953 + 93 = 2046
Step 23: 2046 + 93 = 2139
Step 24: 2139 + 93 = 2232
Step 25: 2232 + 93 = 2325
Step 26: 2325 + 93 = 2418
Step 27: 2418 + 93 = 2511
Step 28: 2511 + 93 = 2604
Step 29: 2604 + 93 = 2697
Step 30: 2697 + 93 = 2790
Step 31: 2790 + 93 = 2883

So, 93*31 = 2883