Let's roll up our sleeves and solve this. We have 844 and we're going to multiply it by 43, essentially adding 844 to itself 43 times.
Step 1: 0 + 844 = 844
Step 2: 844 + 844 = 1688
Step 3: 1688 + 844 = 2532
Step 4: 2532 + 844 = 3376
Step 5: 3376 + 844 = 4220
Step 6: 4220 + 844 = 5064
Step 7: 5064 + 844 = 5908
Step 8: 5908 + 844 = 6752
Step 9: 6752 + 844 = 7596
Step 10: 7596 + 844 = 8440
Step 11: 8440 + 844 = 9284
Step 12: 9284 + 844 = 10128
Step 13: 10128 + 844 = 10972
Step 14: 10972 + 844 = 11816
Step 15: 11816 + 844 = 12660
Step 16: 12660 + 844 = 13504
Step 17: 13504 + 844 = 14348
Step 18: 14348 + 844 = 15192
Step 19: 15192 + 844 = 16036
Step 20: 16036 + 844 = 16880
Step 21: 16880 + 844 = 17724
Step 22: 17724 + 844 = 18568
Step 23: 18568 + 844 = 19412
Step 24: 19412 + 844 = 20256
Step 25: 20256 + 844 = 21100
Step 26: 21100 + 844 = 21944
Step 27: 21944 + 844 = 22788
Step 28: 22788 + 844 = 23632
Step 29: 23632 + 844 = 24476
Step 30: 24476 + 844 = 25320
Step 31: 25320 + 844 = 26164
Step 32: 26164 + 844 = 27008
Step 33: 27008 + 844 = 27852
Step 34: 27852 + 844 = 28696
Step 35: 28696 + 844 = 29540
Step 36: 29540 + 844 = 30384
Step 37: 30384 + 844 = 31228
Step 38: 31228 + 844 = 32072
Step 39: 32072 + 844 = 32916
Step 40: 32916 + 844 = 33760
Step 41: 33760 + 844 = 34604
Step 42: 34604 + 844 = 35448
Step 43: 35448 + 844 = 36292

So, 844*43 = 36292