Sure thing! We've got 905 and we're gonna multiply it by 5. That's the same as adding 905 to itself 5 times.
Step 1: 0 + 905 = 905
Step 2: 905 + 905 = 1810
Step 3: 1810 + 905 = 2715
Step 4: 2715 + 905 = 3620
Step 5: 3620 + 905 = 4525

So, 905*5 = 4525