OK, let's work through this together. We're starting with 562 and we're going to multiply it by 15, which means we add 562 to itself 15 times.
Step 1: 0 + 562 = 562
Step 2: 562 + 562 = 1124
Step 3: 1124 + 562 = 1686
Step 4: 1686 + 562 = 2248
Step 5: 2248 + 562 = 2810
Step 6: 2810 + 562 = 3372
Step 7: 3372 + 562 = 3934
Step 8: 3934 + 562 = 4496
Step 9: 4496 + 562 = 5058
Step 10: 5058 + 562 = 5620
Step 11: 5620 + 562 = 6182
Step 12: 6182 + 562 = 6744
Step 13: 6744 + 562 = 7306
Step 14: 7306 + 562 = 7868
Step 15: 7868 + 562 = 8430

So, 562*15 = 8430