Let's get this math done. We have 206 and we're going to multiply it by 15. This is the same as taking 206 and adding it to itself 15 times.
Step 1: 0 + 206 = 206
Step 2: 206 + 206 = 412
Step 3: 412 + 206 = 618
Step 4: 618 + 206 = 824
Step 5: 824 + 206 = 1030
Step 6: 1030 + 206 = 1236
Step 7: 1236 + 206 = 1442
Step 8: 1442 + 206 = 1648
Step 9: 1648 + 206 = 1854
Step 10: 1854 + 206 = 2060
Step 11: 2060 + 206 = 2266
Step 12: 2266 + 206 = 2472
Step 13: 2472 + 206 = 2678
Step 14: 2678 + 206 = 2884
Step 15: 2884 + 206 = 3090

So, 206*15 = 3090