Without delay, let's solve this. We've got 370 and we will be multiplying it by 15, that is, adding 370 to itself 15 times.
Step 1: 0 + 370 = 370
Step 2: 370 + 370 = 740
Step 3: 740 + 370 = 1110
Step 4: 1110 + 370 = 1480
Step 5: 1480 + 370 = 1850
Step 6: 1850 + 370 = 2220
Step 7: 2220 + 370 = 2590
Step 8: 2590 + 370 = 2960
Step 9: 2960 + 370 = 3330
Step 10: 3330 + 370 = 3700
Step 11: 3700 + 370 = 4070
Step 12: 4070 + 370 = 4440
Step 13: 4440 + 370 = 4810
Step 14: 4810 + 370 = 5180
Step 15: 5180 + 370 = 5550

So, 370*15 = 5550