Alright, let's solve this math problem step by step. First, we have the number 673. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 64. So, we're going to take the number 673 and add it to itself 64 times.
Step 1: 0 + 673 = 673
Step 2: 673 + 673 = 1346
Step 3: 1346 + 673 = 2019
Step 4: 2019 + 673 = 2692
Step 5: 2692 + 673 = 3365
Step 6: 3365 + 673 = 4038
Step 7: 4038 + 673 = 4711
Step 8: 4711 + 673 = 5384
Step 9: 5384 + 673 = 6057
Step 10: 6057 + 673 = 6730
Step 11: 6730 + 673 = 7403
Step 12: 7403 + 673 = 8076
Step 13: 8076 + 673 = 8749
Step 14: 8749 + 673 = 9422
Step 15: 9422 + 673 = 10095
Step 16: 10095 + 673 = 10768
Step 17: 10768 + 673 = 11441
Step 18: 11441 + 673 = 12114
Step 19: 12114 + 673 = 12787
Step 20: 12787 + 673 = 13460
Step 21: 13460 + 673 = 14133
Step 22: 14133 + 673 = 14806
Step 23: 14806 + 673 = 15479
Step 24: 15479 + 673 = 16152
Step 25: 16152 + 673 = 16825
Step 26: 16825 + 673 = 17498
Step 27: 17498 + 673 = 18171
Step 28: 18171 + 673 = 18844
Step 29: 18844 + 673 = 19517
Step 30: 19517 + 673 = 20190
Step 31: 20190 + 673 = 20863
Step 32: 20863 + 673 = 21536
Step 33: 21536 + 673 = 22209
Step 34: 22209 + 673 = 22882
Step 35: 22882 + 673 = 23555
Step 36: 23555 + 673 = 24228
Step 37: 24228 + 673 = 24901
Step 38: 24901 + 673 = 25574
Step 39: 25574 + 673 = 26247
Step 40: 26247 + 673 = 26920
Step 41: 26920 + 673 = 27593
Step 42: 27593 + 673 = 28266
Step 43: 28266 + 673 = 28939
Step 44: 28939 + 673 = 29612
Step 45: 29612 + 673 = 30285
Step 46: 30285 + 673 = 30958
Step 47: 30958 + 673 = 31631
Step 48: 31631 + 673 = 32304
Step 49: 32304 + 673 = 32977
Step 50: 32977 + 673 = 33650
Step 51: 33650 + 673 = 34323
Step 52: 34323 + 673 = 34996
Step 53: 34996 + 673 = 35669
Step 54: 35669 + 673 = 36342
Step 55: 36342 + 673 = 37015
Step 56: 37015 + 673 = 37688
Step 57: 37688 + 673 = 38361
Step 58: 38361 + 673 = 39034
Step 59: 39034 + 673 = 39707
Step 60: 39707 + 673 = 40380
Step 61: 40380 + 673 = 41053
Step 62: 41053 + 673 = 41726
Step 63: 41726 + 673 = 42399
Step 64: 42399 + 673 = 43072

So, 673*64 = 43072