Mike and Jeff are close friends. Their school is having a guessing game to guess how many gumballs are in a box. If they get the right amount they win $100. If they get close they get a $20 gift card. The box looks like it is missing some gumballs. It turns out some people are eating them when they place their guess. 100 people guessed and took a piece of candy. The box is 10" by 10" by 10". Each gumball is 1" each. Mike guessed 500. Jeff guessed 800. They both said they would split their money they win, if they win.

Question: "How might someone make an educated guess as to how many gumballs are in the box?"

Response: "Multiply the number of gumballs by the area, and subtract the missing ones"

Does the response correctly answer the question?
yes