How so i estimate the quotient of 38,472:4

If you know what 38/4 is or what 38.5/4 is that would give you a more accurate estimate, but if you don't follow these rules.

What's the closest number that I know is divisible by 4? 40,000?

Let's say it is 40,000. we know that 40,000 : 4 = 10,000. 40,000 is greater than 38,472 so our estimate will be greater than the real answer. So, we can say that 38,472 : 4 ≈ 10,000 or a bit less than 10,000.

≈ means approximately equal to.