Let's roll up our sleeves and solve this. We have 546 and we're going to multiply it by 8, essentially adding 546 to itself 8 times.
Step 1: 0 + 546 = 546
Step 2: 546 + 546 = 1092
Step 3: 1092 + 546 = 1638
Step 4: 1638 + 546 = 2184
Step 5: 2184 + 546 = 2730
Step 6: 2730 + 546 = 3276
Step 7: 3276 + 546 = 3822
Step 8: 3822 + 546 = 4368

So, 546*8 = 4368