Sure thing, let's get straight to it. We start with 268 and we're going to multiply it by 15, which means adding 268 to itself 15 times.
Step 1: 0 + 268 = 268
Step 2: 268 + 268 = 536
Step 3: 536 + 268 = 804
Step 4: 804 + 268 = 1072
Step 5: 1072 + 268 = 1340
Step 6: 1340 + 268 = 1608
Step 7: 1608 + 268 = 1876
Step 8: 1876 + 268 = 2144
Step 9: 2144 + 268 = 2412
Step 10: 2412 + 268 = 2680
Step 11: 2680 + 268 = 2948
Step 12: 2948 + 268 = 3216
Step 13: 3216 + 268 = 3484
Step 14: 3484 + 268 = 3752
Step 15: 3752 + 268 = 4020

So, 268*15 = 4020