Sure thing, let's get straight to it. We start with 923 and we're going to multiply it by 31, which means adding 923 to itself 31 times.
Step 1: 0 + 923 = 923
Step 2: 923 + 923 = 1846
Step 3: 1846 + 923 = 2769
Step 4: 2769 + 923 = 3692
Step 5: 3692 + 923 = 4615
Step 6: 4615 + 923 = 5538
Step 7: 5538 + 923 = 6461
Step 8: 6461 + 923 = 7384
Step 9: 7384 + 923 = 8307
Step 10: 8307 + 923 = 9230
Step 11: 9230 + 923 = 10153
Step 12: 10153 + 923 = 11076
Step 13: 11076 + 923 = 11999
Step 14: 11999 + 923 = 12922
Step 15: 12922 + 923 = 13845
Step 16: 13845 + 923 = 14768
Step 17: 14768 + 923 = 15691
Step 18: 15691 + 923 = 16614
Step 19: 16614 + 923 = 17537
Step 20: 17537 + 923 = 18460
Step 21: 18460 + 923 = 19383
Step 22: 19383 + 923 = 20306
Step 23: 20306 + 923 = 21229
Step 24: 21229 + 923 = 22152
Step 25: 22152 + 923 = 23075
Step 26: 23075 + 923 = 23998
Step 27: 23998 + 923 = 24921
Step 28: 24921 + 923 = 25844
Step 29: 25844 + 923 = 26767
Step 30: 26767 + 923 = 27690
Step 31: 27690 + 923 = 28613

So, 923*31 = 28613