OK, let's work through this together. We're starting with 886 and we're going to multiply it by 23, which means we add 886 to itself 23 times.
Step 1: 0 + 886 = 886
Step 2: 886 + 886 = 1772
Step 3: 1772 + 886 = 2658
Step 4: 2658 + 886 = 3544
Step 5: 3544 + 886 = 4430
Step 6: 4430 + 886 = 5316
Step 7: 5316 + 886 = 6202
Step 8: 6202 + 886 = 7088
Step 9: 7088 + 886 = 7974
Step 10: 7974 + 886 = 8860
Step 11: 8860 + 886 = 9746
Step 12: 9746 + 886 = 10632
Step 13: 10632 + 886 = 11518
Step 14: 11518 + 886 = 12404
Step 15: 12404 + 886 = 13290
Step 16: 13290 + 886 = 14176
Step 17: 14176 + 886 = 15062
Step 18: 15062 + 886 = 15948
Step 19: 15948 + 886 = 16834
Step 20: 16834 + 886 = 17720
Step 21: 17720 + 886 = 18606
Step 22: 18606 + 886 = 19492
Step 23: 19492 + 886 = 20378

So, 886*23 = 20378