OK, let's crack this. We're given 478 and our task is to multiply it by 15. Essentially, we'll be adding 478 to itself 15 times.
Step 1: 0 + 478 = 478
Step 2: 478 + 478 = 956
Step 3: 956 + 478 = 1434
Step 4: 1434 + 478 = 1912
Step 5: 1912 + 478 = 2390
Step 6: 2390 + 478 = 2868
Step 7: 2868 + 478 = 3346
Step 8: 3346 + 478 = 3824
Step 9: 3824 + 478 = 4302
Step 10: 4302 + 478 = 4780
Step 11: 4780 + 478 = 5258
Step 12: 5258 + 478 = 5736
Step 13: 5736 + 478 = 6214
Step 14: 6214 + 478 = 6692
Step 15: 6692 + 478 = 7170

So, 478*15 = 7170