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 80. So, we're going to take the number 99 and add it to itself 80 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
Step 32: 3069 + 99 = 3168
Step 33: 3168 + 99 = 3267
Step 34: 3267 + 99 = 3366
Step 35: 3366 + 99 = 3465
Step 36: 3465 + 99 = 3564
Step 37: 3564 + 99 = 3663
Step 38: 3663 + 99 = 3762
Step 39: 3762 + 99 = 3861
Step 40: 3861 + 99 = 3960
Step 41: 3960 + 99 = 4059
Step 42: 4059 + 99 = 4158
Step 43: 4158 + 99 = 4257
Step 44: 4257 + 99 = 4356
Step 45: 4356 + 99 = 4455
Step 46: 4455 + 99 = 4554
Step 47: 4554 + 99 = 4653
Step 48: 4653 + 99 = 4752
Step 49: 4752 + 99 = 4851
Step 50: 4851 + 99 = 4950
Step 51: 4950 + 99 = 5049
Step 52: 5049 + 99 = 5148
Step 53: 5148 + 99 = 5247
Step 54: 5247 + 99 = 5346
Step 55: 5346 + 99 = 5445
Step 56: 5445 + 99 = 5544
Step 57: 5544 + 99 = 5643
Step 58: 5643 + 99 = 5742
Step 59: 5742 + 99 = 5841
Step 60: 5841 + 99 = 5940
Step 61: 5940 + 99 = 6039
Step 62: 6039 + 99 = 6138
Step 63: 6138 + 99 = 6237
Step 64: 6237 + 99 = 6336
Step 65: 6336 + 99 = 6435
Step 66: 6435 + 99 = 6534
Step 67: 6534 + 99 = 6633
Step 68: 6633 + 99 = 6732
Step 69: 6732 + 99 = 6831
Step 70: 6831 + 99 = 6930
Step 71: 6930 + 99 = 7029
Step 72: 7029 + 99 = 7128
Step 73: 7128 + 99 = 7227
Step 74: 7227 + 99 = 7326
Step 75: 7326 + 99 = 7425
Step 76: 7425 + 99 = 7524
Step 77: 7524 + 99 = 7623
Step 78: 7623 + 99 = 7722
Step 79: 7722 + 99 = 7821
Step 80: 7821 + 99 = 7920

So, 99*80 = 7920