Sure thing, let's get straight to it. We start with 50 and we're going to multiply it by 15, which means adding 50 to itself 15 times.
Step 1: 0 + 50 = 50
Step 2: 50 + 50 = 100
Step 3: 100 + 50 = 150
Step 4: 150 + 50 = 200
Step 5: 200 + 50 = 250
Step 6: 250 + 50 = 300
Step 7: 300 + 50 = 350
Step 8: 350 + 50 = 400
Step 9: 400 + 50 = 450
Step 10: 450 + 50 = 500
Step 11: 500 + 50 = 550
Step 12: 550 + 50 = 600
Step 13: 600 + 50 = 650
Step 14: 650 + 50 = 700
Step 15: 700 + 50 = 750

So, 50*15 = 750