how to convert

Question

A house contains one 12-foot-×-14-foot bedroom, one 12-foot-×-10-foot bedroom, and one 8-foot-×-12-foot bedroom. What’s the total amount of carpeting needed to carpet all three bedrooms? i would like to know how do i get the answer 42 1/2 they say divide by nine but how do i get nine?

Answer 1

my apology its not 42 1/2 its 42 2/3.