Alright, let's solve this math problem step by step. First, we have the number 173. 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 173 and add it to itself 80 times.
Step 1: 0 + 173 = 173
Step 2: 173 + 173 = 346
Step 3: 346 + 173 = 519
Step 4: 519 + 173 = 692
Step 5: 692 + 173 = 865
Step 6: 865 + 173 = 1038
Step 7: 1038 + 173 = 1211
Step 8: 1211 + 173 = 1384
Step 9: 1384 + 173 = 1557
Step 10: 1557 + 173 = 1730
Step 11: 1730 + 173 = 1903
Step 12: 1903 + 173 = 2076
Step 13: 2076 + 173 = 2249
Step 14: 2249 + 173 = 2422
Step 15: 2422 + 173 = 2595
Step 16: 2595 + 173 = 2768
Step 17: 2768 + 173 = 2941
Step 18: 2941 + 173 = 3114
Step 19: 3114 + 173 = 3287
Step 20: 3287 + 173 = 3460
Step 21: 3460 + 173 = 3633
Step 22: 3633 + 173 = 3806
Step 23: 3806 + 173 = 3979
Step 24: 3979 + 173 = 4152
Step 25: 4152 + 173 = 4325
Step 26: 4325 + 173 = 4498
Step 27: 4498 + 173 = 4671
Step 28: 4671 + 173 = 4844
Step 29: 4844 + 173 = 5017
Step 30: 5017 + 173 = 5190
Step 31: 5190 + 173 = 5363
Step 32: 5363 + 173 = 5536
Step 33: 5536 + 173 = 5709
Step 34: 5709 + 173 = 5882
Step 35: 5882 + 173 = 6055
Step 36: 6055 + 173 = 6228
Step 37: 6228 + 173 = 6401
Step 38: 6401 + 173 = 6574
Step 39: 6574 + 173 = 6747
Step 40: 6747 + 173 = 6920
Step 41: 6920 + 173 = 7093
Step 42: 7093 + 173 = 7266
Step 43: 7266 + 173 = 7439
Step 44: 7439 + 173 = 7612
Step 45: 7612 + 173 = 7785
Step 46: 7785 + 173 = 7958
Step 47: 7958 + 173 = 8131
Step 48: 8131 + 173 = 8304
Step 49: 8304 + 173 = 8477
Step 50: 8477 + 173 = 8650
Step 51: 8650 + 173 = 8823
Step 52: 8823 + 173 = 8996
Step 53: 8996 + 173 = 9169
Step 54: 9169 + 173 = 9342
Step 55: 9342 + 173 = 9515
Step 56: 9515 + 173 = 9688
Step 57: 9688 + 173 = 9861
Step 58: 9861 + 173 = 10034
Step 59: 10034 + 173 = 10207
Step 60: 10207 + 173 = 10380
Step 61: 10380 + 173 = 10553
Step 62: 10553 + 173 = 10726
Step 63: 10726 + 173 = 10899
Step 64: 10899 + 173 = 11072
Step 65: 11072 + 173 = 11245
Step 66: 11245 + 173 = 11418
Step 67: 11418 + 173 = 11591
Step 68: 11591 + 173 = 11764
Step 69: 11764 + 173 = 11937
Step 70: 11937 + 173 = 12110
Step 71: 12110 + 173 = 12283
Step 72: 12283 + 173 = 12456
Step 73: 12456 + 173 = 12629
Step 74: 12629 + 173 = 12802
Step 75: 12802 + 173 = 12975
Step 76: 12975 + 173 = 13148
Step 77: 13148 + 173 = 13321
Step 78: 13321 + 173 = 13494
Step 79: 13494 + 173 = 13667
Step 80: 13667 + 173 = 13840

So, 173*80 = 13840