OK, let's work through this together. We're starting with 152 and we're going to multiply it by 23, which means we add 152 to itself 23 times.
Step 1: 0 + 152 = 152
Step 2: 152 + 152 = 304
Step 3: 304 + 152 = 456
Step 4: 456 + 152 = 608
Step 5: 608 + 152 = 760
Step 6: 760 + 152 = 912
Step 7: 912 + 152 = 1064
Step 8: 1064 + 152 = 1216
Step 9: 1216 + 152 = 1368
Step 10: 1368 + 152 = 1520
Step 11: 1520 + 152 = 1672
Step 12: 1672 + 152 = 1824
Step 13: 1824 + 152 = 1976
Step 14: 1976 + 152 = 2128
Step 15: 2128 + 152 = 2280
Step 16: 2280 + 152 = 2432
Step 17: 2432 + 152 = 2584
Step 18: 2584 + 152 = 2736
Step 19: 2736 + 152 = 2888
Step 20: 2888 + 152 = 3040
Step 21: 3040 + 152 = 3192
Step 22: 3192 + 152 = 3344
Step 23: 3344 + 152 = 3496

So, 152*23 = 3496