Let's roll up our sleeves and solve this. We have 190 and we're going to multiply it by 15, essentially adding 190 to itself 15 times.
Step 1: 0 + 190 = 190
Step 2: 190 + 190 = 380
Step 3: 380 + 190 = 570
Step 4: 570 + 190 = 760
Step 5: 760 + 190 = 950
Step 6: 950 + 190 = 1140
Step 7: 1140 + 190 = 1330
Step 8: 1330 + 190 = 1520
Step 9: 1520 + 190 = 1710
Step 10: 1710 + 190 = 1900
Step 11: 1900 + 190 = 2090
Step 12: 2090 + 190 = 2280
Step 13: 2280 + 190 = 2470
Step 14: 2470 + 190 = 2660
Step 15: 2660 + 190 = 2850

So, 190*15 = 2850