Answer :
We can round to the nearest thousand to get the following numerator:
[tex]635,943\approx640,000[/tex]and we can also round the denominator to get this:
[tex]77\approx80[/tex]so, the quotient would be:
[tex]\frac{635,943}{77}\approx\frac{640,000}{80}=8000[/tex]