Let's roll up our sleeves and solve this. We have 483 and we're going to multiply it by 80, essentially adding 483 to itself 80 times.
Step 1: 0 + 483 = 483
Step 2: 483 + 483 = 966
Step 3: 966 + 483 = 1449
Step 4: 1449 + 483 = 1932
Step 5: 1932 + 483 = 2415
Step 6: 2415 + 483 = 2898
Step 7: 2898 + 483 = 3381
Step 8: 3381 + 483 = 3864
Step 9: 3864 + 483 = 4347
Step 10: 4347 + 483 = 4830
Step 11: 4830 + 483 = 5313
Step 12: 5313 + 483 = 5796
Step 13: 5796 + 483 = 6279
Step 14: 6279 + 483 = 6762
Step 15: 6762 + 483 = 7245
Step 16: 7245 + 483 = 7728
Step 17: 7728 + 483 = 8211
Step 18: 8211 + 483 = 8694
Step 19: 8694 + 483 = 9177
Step 20: 9177 + 483 = 9660
Step 21: 9660 + 483 = 10143
Step 22: 10143 + 483 = 10626
Step 23: 10626 + 483 = 11109
Step 24: 11109 + 483 = 11592
Step 25: 11592 + 483 = 12075
Step 26: 12075 + 483 = 12558
Step 27: 12558 + 483 = 13041
Step 28: 13041 + 483 = 13524
Step 29: 13524 + 483 = 14007
Step 30: 14007 + 483 = 14490
Step 31: 14490 + 483 = 14973
Step 32: 14973 + 483 = 15456
Step 33: 15456 + 483 = 15939
Step 34: 15939 + 483 = 16422
Step 35: 16422 + 483 = 16905
Step 36: 16905 + 483 = 17388
Step 37: 17388 + 483 = 17871
Step 38: 17871 + 483 = 18354
Step 39: 18354 + 483 = 18837
Step 40: 18837 + 483 = 19320
Step 41: 19320 + 483 = 19803
Step 42: 19803 + 483 = 20286
Step 43: 20286 + 483 = 20769
Step 44: 20769 + 483 = 21252
Step 45: 21252 + 483 = 21735
Step 46: 21735 + 483 = 22218
Step 47: 22218 + 483 = 22701
Step 48: 22701 + 483 = 23184
Step 49: 23184 + 483 = 23667
Step 50: 23667 + 483 = 24150
Step 51: 24150 + 483 = 24633
Step 52: 24633 + 483 = 25116
Step 53: 25116 + 483 = 25599
Step 54: 25599 + 483 = 26082
Step 55: 26082 + 483 = 26565
Step 56: 26565 + 483 = 27048
Step 57: 27048 + 483 = 27531
Step 58: 27531 + 483 = 28014
Step 59: 28014 + 483 = 28497
Step 60: 28497 + 483 = 28980
Step 61: 28980 + 483 = 29463
Step 62: 29463 + 483 = 29946
Step 63: 29946 + 483 = 30429
Step 64: 30429 + 483 = 30912
Step 65: 30912 + 483 = 31395
Step 66: 31395 + 483 = 31878
Step 67: 31878 + 483 = 32361
Step 68: 32361 + 483 = 32844
Step 69: 32844 + 483 = 33327
Step 70: 33327 + 483 = 33810
Step 71: 33810 + 483 = 34293
Step 72: 34293 + 483 = 34776
Step 73: 34776 + 483 = 35259
Step 74: 35259 + 483 = 35742
Step 75: 35742 + 483 = 36225
Step 76: 36225 + 483 = 36708
Step 77: 36708 + 483 = 37191
Step 78: 37191 + 483 = 37674
Step 79: 37674 + 483 = 38157
Step 80: 38157 + 483 = 38640

So, 483*80 = 38640