Sure thing! We've got 850 and we're gonna multiply it by 5. That's the same as adding 850 to itself 5 times.
Step 1: 0 + 850 = 850
Step 2: 850 + 850 = 1700
Step 3: 1700 + 850 = 2550
Step 4: 2550 + 850 = 3400
Step 5: 3400 + 850 = 4250

So, 850*5 = 4250