Let's roll up our sleeves and solve this. We have 903 and we're going to multiply it by 32, essentially adding 903 to itself 32 times.
Step 1: 0 + 903 = 903
Step 2: 903 + 903 = 1806
Step 3: 1806 + 903 = 2709
Step 4: 2709 + 903 = 3612
Step 5: 3612 + 903 = 4515
Step 6: 4515 + 903 = 5418
Step 7: 5418 + 903 = 6321
Step 8: 6321 + 903 = 7224
Step 9: 7224 + 903 = 8127
Step 10: 8127 + 903 = 9030
Step 11: 9030 + 903 = 9933
Step 12: 9933 + 903 = 10836
Step 13: 10836 + 903 = 11739
Step 14: 11739 + 903 = 12642
Step 15: 12642 + 903 = 13545
Step 16: 13545 + 903 = 14448
Step 17: 14448 + 903 = 15351
Step 18: 15351 + 903 = 16254
Step 19: 16254 + 903 = 17157
Step 20: 17157 + 903 = 18060
Step 21: 18060 + 903 = 18963
Step 22: 18963 + 903 = 19866
Step 23: 19866 + 903 = 20769
Step 24: 20769 + 903 = 21672
Step 25: 21672 + 903 = 22575
Step 26: 22575 + 903 = 23478
Step 27: 23478 + 903 = 24381
Step 28: 24381 + 903 = 25284
Step 29: 25284 + 903 = 26187
Step 30: 26187 + 903 = 27090
Step 31: 27090 + 903 = 27993
Step 32: 27993 + 903 = 28896

So, 903*32 = 28896