A rectangular floor that measures 15 meters by 18 meters is to be covered with carpet squares that each measure 3 meters by 3 meters. If the carpet squares cost $12 apiece, what is the total cost for the number of carpet squares needed to cover the floor?	Options
A) $200
B) $240
C) $360
D) $960
E) $1,920
The width of the rectangular floor(15 m) is a multiple of one side of the square(3 m), and the length of the floor(18 m) is also a multiple of the side of the square. So the number of carpets to cover the floor is (15/3)*(18/3)= 
<gadget id="calculator">(15/3)*(18/3)</gadget>
<output>30</output>
30.   The total cost is 30*12= 
<gadget id="calculator">30*12</gadget>
<output>360</output>
$360.   The answer is, therefore, $360.
<result>C</result>
A rectangular floor that measures 15 meters by 18 meters is to be covered with carpet squares that each measure 3 meters by 3 meters. If the carpet squares cost $12 apiece, what is the total cost for the number of carpet squares needed to cover the floor?