Problem: a cheese factory sells its cheese in rectangular blocks . a normal block has a volume of three cubic feet . if a large block has twice the width , twice the depth , and three times the length of a normal block , what is the volume of cheese in a large block in cubic feet ? 
Options: ['a ) 18', 'b ) 6', 'c ) 27', 'd ) 48', 'e ) 36']
e