Please friends help to solve this issue

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

9/10 divide by -3/15 as a mixed number

Write as a product: ac^2–ad+c^3–cd–bc^2+bd