OK, let's work through this together. We're starting with 233 and we're going to multiply it by 23, which means we add 233 to itself 23 times.
Step 1: 0 + 233 = 233
Step 2: 233 + 233 = 466
Step 3: 466 + 233 = 699
Step 4: 699 + 233 = 932
Step 5: 932 + 233 = 1165
Step 6: 1165 + 233 = 1398
Step 7: 1398 + 233 = 1631
Step 8: 1631 + 233 = 1864
Step 9: 1864 + 233 = 2097
Step 10: 2097 + 233 = 2330
Step 11: 2330 + 233 = 2563
Step 12: 2563 + 233 = 2796
Step 13: 2796 + 233 = 3029
Step 14: 3029 + 233 = 3262
Step 15: 3262 + 233 = 3495
Step 16: 3495 + 233 = 3728
Step 17: 3728 + 233 = 3961
Step 18: 3961 + 233 = 4194
Step 19: 4194 + 233 = 4427
Step 20: 4427 + 233 = 4660
Step 21: 4660 + 233 = 4893
Step 22: 4893 + 233 = 5126
Step 23: 5126 + 233 = 5359

So, 233*23 = 5359