Alright, let's solve this math problem step by step. First, we have the number 542. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 31. So, we're going to take the number 542 and add it to itself 31 times.
Step 1: 0 + 542 = 542
Step 2: 542 + 542 = 1084
Step 3: 1084 + 542 = 1626
Step 4: 1626 + 542 = 2168
Step 5: 2168 + 542 = 2710
Step 6: 2710 + 542 = 3252
Step 7: 3252 + 542 = 3794
Step 8: 3794 + 542 = 4336
Step 9: 4336 + 542 = 4878
Step 10: 4878 + 542 = 5420
Step 11: 5420 + 542 = 5962
Step 12: 5962 + 542 = 6504
Step 13: 6504 + 542 = 7046
Step 14: 7046 + 542 = 7588
Step 15: 7588 + 542 = 8130
Step 16: 8130 + 542 = 8672
Step 17: 8672 + 542 = 9214
Step 18: 9214 + 542 = 9756
Step 19: 9756 + 542 = 10298
Step 20: 10298 + 542 = 10840
Step 21: 10840 + 542 = 11382
Step 22: 11382 + 542 = 11924
Step 23: 11924 + 542 = 12466
Step 24: 12466 + 542 = 13008
Step 25: 13008 + 542 = 13550
Step 26: 13550 + 542 = 14092
Step 27: 14092 + 542 = 14634
Step 28: 14634 + 542 = 15176
Step 29: 15176 + 542 = 15718
Step 30: 15718 + 542 = 16260
Step 31: 16260 + 542 = 16802

So, 542*31 = 16802