Let's roll up our sleeves and solve this. We have 906 and we're going to multiply it by 8, essentially adding 906 to itself 8 times.
Step 1: 0 + 906 = 906
Step 2: 906 + 906 = 1812
Step 3: 1812 + 906 = 2718
Step 4: 2718 + 906 = 3624
Step 5: 3624 + 906 = 4530
Step 6: 4530 + 906 = 5436
Step 7: 5436 + 906 = 6342
Step 8: 6342 + 906 = 7248

So, 906*8 = 7248