Let's roll up our sleeves and solve this. We have 881 and we're going to multiply it by 6, essentially adding 881 to itself 6 times.
Step 1: 0 + 881 = 881
Step 2: 881 + 881 = 1762
Step 3: 1762 + 881 = 2643
Step 4: 2643 + 881 = 3524
Step 5: 3524 + 881 = 4405
Step 6: 4405 + 881 = 5286

So, 881*6 = 5286