Let's roll up our sleeves and solve this. We have 923 and we're going to multiply it by 50, essentially adding 923 to itself 50 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
Step 32: 28613 + 923 = 29536
Step 33: 29536 + 923 = 30459
Step 34: 30459 + 923 = 31382
Step 35: 31382 + 923 = 32305
Step 36: 32305 + 923 = 33228
Step 37: 33228 + 923 = 34151
Step 38: 34151 + 923 = 35074
Step 39: 35074 + 923 = 35997
Step 40: 35997 + 923 = 36920
Step 41: 36920 + 923 = 37843
Step 42: 37843 + 923 = 38766
Step 43: 38766 + 923 = 39689
Step 44: 39689 + 923 = 40612
Step 45: 40612 + 923 = 41535
Step 46: 41535 + 923 = 42458
Step 47: 42458 + 923 = 43381
Step 48: 43381 + 923 = 44304
Step 49: 44304 + 923 = 45227
Step 50: 45227 + 923 = 46150

So, 923*50 = 46150