OK, let's work through this together. We're starting with 743 and we're going to multiply it by 31, which means we add 743 to itself 31 times.
Step 1: 0 + 743 = 743
Step 2: 743 + 743 = 1486
Step 3: 1486 + 743 = 2229
Step 4: 2229 + 743 = 2972
Step 5: 2972 + 743 = 3715
Step 6: 3715 + 743 = 4458
Step 7: 4458 + 743 = 5201
Step 8: 5201 + 743 = 5944
Step 9: 5944 + 743 = 6687
Step 10: 6687 + 743 = 7430
Step 11: 7430 + 743 = 8173
Step 12: 8173 + 743 = 8916
Step 13: 8916 + 743 = 9659
Step 14: 9659 + 743 = 10402
Step 15: 10402 + 743 = 11145
Step 16: 11145 + 743 = 11888
Step 17: 11888 + 743 = 12631
Step 18: 12631 + 743 = 13374
Step 19: 13374 + 743 = 14117
Step 20: 14117 + 743 = 14860
Step 21: 14860 + 743 = 15603
Step 22: 15603 + 743 = 16346
Step 23: 16346 + 743 = 17089
Step 24: 17089 + 743 = 17832
Step 25: 17832 + 743 = 18575
Step 26: 18575 + 743 = 19318
Step 27: 19318 + 743 = 20061
Step 28: 20061 + 743 = 20804
Step 29: 20804 + 743 = 21547
Step 30: 21547 + 743 = 22290
Step 31: 22290 + 743 = 23033

So, 743*31 = 23033