If you multiply both numbers by the same number than how many times one number is than the other will not change.
I will multiply both numbers by 10^6 = 1,000,000. This will just move the decimals places to the left.
Now compare these two numbers: 4 and 8,000. Either you can look at the two numbers yo see how much bigger one is than the other or you can divide them (8000/4)