Alright, let's solve this math problem step by step. First, we have the number 99. 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 99 and add it to itself 31 times.
Step 1: 0 + 99 = 99
Step 2: 99 + 99 = 198
Step 3: 198 + 99 = 297
Step 4: 297 + 99 = 396
Step 5: 396 + 99 = 495
Step 6: 495 + 99 = 594
Step 7: 594 + 99 = 693
Step 8: 693 + 99 = 792
Step 9: 792 + 99 = 891
Step 10: 891 + 99 = 990
Step 11: 990 + 99 = 1089
Step 12: 1089 + 99 = 1188
Step 13: 1188 + 99 = 1287
Step 14: 1287 + 99 = 1386
Step 15: 1386 + 99 = 1485
Step 16: 1485 + 99 = 1584
Step 17: 1584 + 99 = 1683
Step 18: 1683 + 99 = 1782
Step 19: 1782 + 99 = 1881
Step 20: 1881 + 99 = 1980
Step 21: 1980 + 99 = 2079
Step 22: 2079 + 99 = 2178
Step 23: 2178 + 99 = 2277
Step 24: 2277 + 99 = 2376
Step 25: 2376 + 99 = 2475
Step 26: 2475 + 99 = 2574
Step 27: 2574 + 99 = 2673
Step 28: 2673 + 99 = 2772
Step 29: 2772 + 99 = 2871
Step 30: 2871 + 99 = 2970
Step 31: 2970 + 99 = 3069

So, 99*31 = 3069