OK, let's crack this. We're given 174 and our task is to multiply it by 15. Essentially, we'll be adding 174 to itself 15 times.
Step 1: 0 + 174 = 174
Step 2: 174 + 174 = 348
Step 3: 348 + 174 = 522
Step 4: 522 + 174 = 696
Step 5: 696 + 174 = 870
Step 6: 870 + 174 = 1044
Step 7: 1044 + 174 = 1218
Step 8: 1218 + 174 = 1392
Step 9: 1392 + 174 = 1566
Step 10: 1566 + 174 = 1740
Step 11: 1740 + 174 = 1914
Step 12: 1914 + 174 = 2088
Step 13: 2088 + 174 = 2262
Step 14: 2262 + 174 = 2436
Step 15: 2436 + 174 = 2610

So, 174*15 = 2610