Alright, let's solve this math problem step by step. First, we have the number 831. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 43. So, we're going to take the number 831 and add it to itself 43 times.
Step 1: 0 + 831 = 831
Step 2: 831 + 831 = 1662
Step 3: 1662 + 831 = 2493
Step 4: 2493 + 831 = 3324
Step 5: 3324 + 831 = 4155
Step 6: 4155 + 831 = 4986
Step 7: 4986 + 831 = 5817
Step 8: 5817 + 831 = 6648
Step 9: 6648 + 831 = 7479
Step 10: 7479 + 831 = 8310
Step 11: 8310 + 831 = 9141
Step 12: 9141 + 831 = 9972
Step 13: 9972 + 831 = 10803
Step 14: 10803 + 831 = 11634
Step 15: 11634 + 831 = 12465
Step 16: 12465 + 831 = 13296
Step 17: 13296 + 831 = 14127
Step 18: 14127 + 831 = 14958
Step 19: 14958 + 831 = 15789
Step 20: 15789 + 831 = 16620
Step 21: 16620 + 831 = 17451
Step 22: 17451 + 831 = 18282
Step 23: 18282 + 831 = 19113
Step 24: 19113 + 831 = 19944
Step 25: 19944 + 831 = 20775
Step 26: 20775 + 831 = 21606
Step 27: 21606 + 831 = 22437
Step 28: 22437 + 831 = 23268
Step 29: 23268 + 831 = 24099
Step 30: 24099 + 831 = 24930
Step 31: 24930 + 831 = 25761
Step 32: 25761 + 831 = 26592
Step 33: 26592 + 831 = 27423
Step 34: 27423 + 831 = 28254
Step 35: 28254 + 831 = 29085
Step 36: 29085 + 831 = 29916
Step 37: 29916 + 831 = 30747
Step 38: 30747 + 831 = 31578
Step 39: 31578 + 831 = 32409
Step 40: 32409 + 831 = 33240
Step 41: 33240 + 831 = 34071
Step 42: 34071 + 831 = 34902
Step 43: 34902 + 831 = 35733

So, 831*43 = 35733