Someone help me please

I’m stuck on this i don’t understand.

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r