Let's roll up our sleeves and solve this. We have 909 and we're going to multiply it by 6, essentially adding 909 to itself 6 times.
Step 1: 0 + 909 = 909
Step 2: 909 + 909 = 1818
Step 3: 1818 + 909 = 2727
Step 4: 2727 + 909 = 3636
Step 5: 3636 + 909 = 4545
Step 6: 4545 + 909 = 5454

So, 909*6 = 5454