OK, let's work through this together. We're starting with 492 and we're going to multiply it by 15, which means we add 492 to itself 15 times.
Step 1: 0 + 492 = 492
Step 2: 492 + 492 = 984
Step 3: 984 + 492 = 1476
Step 4: 1476 + 492 = 1968
Step 5: 1968 + 492 = 2460
Step 6: 2460 + 492 = 2952
Step 7: 2952 + 492 = 3444
Step 8: 3444 + 492 = 3936
Step 9: 3936 + 492 = 4428
Step 10: 4428 + 492 = 4920
Step 11: 4920 + 492 = 5412
Step 12: 5412 + 492 = 5904
Step 13: 5904 + 492 = 6396
Step 14: 6396 + 492 = 6888
Step 15: 6888 + 492 = 7380

So, 492*15 = 7380