Sure thing, let's get straight to it. We start with 323 and we're going to multiply it by 15, which means adding 323 to itself 15 times.
Step 1: 0 + 323 = 323
Step 2: 323 + 323 = 646
Step 3: 646 + 323 = 969
Step 4: 969 + 323 = 1292
Step 5: 1292 + 323 = 1615
Step 6: 1615 + 323 = 1938
Step 7: 1938 + 323 = 2261
Step 8: 2261 + 323 = 2584
Step 9: 2584 + 323 = 2907
Step 10: 2907 + 323 = 3230
Step 11: 3230 + 323 = 3553
Step 12: 3553 + 323 = 3876
Step 13: 3876 + 323 = 4199
Step 14: 4199 + 323 = 4522
Step 15: 4522 + 323 = 4845

So, 323*15 = 4845