Tony is painting a room with four walls. The north and south walls are 10 x 8 feet. The east and west walls are 5 x 8 feet. A gallon of paint can cover 20 square feet and cost $12. How much will it cost to paint the room?
The north and south walls are 80 square feet each because 10 x 8 = 
<gadget id="calculator">10*8</gadget>
<output>80</output>
80.
The east and west walls are 40 square feet because 5 x 8 = 
<gadget id="calculator">5*8</gadget>
<output>40</output>
40.
The south and north walls total 160 square feet because 80 x 2 = 
<gadget id="calculator">80*2</gadget>
<output>160</output>
160.
The East and west walls total 80 square feet because 40 x 2 = 
<gadget id="calculator">40*2</gadget>
<output>80</output>
80.
All the walls total 240 square feet because 160 + 80 = 
<gadget id="calculator">160+80</gadget>
<output>240</output>
240.
He will need 12 gallons of paint because 240 / 20 = 
<gadget id="calculator">240/20</gadget>
<output>12</output>
12.
It will cost $144 because 12 x 12 = 
<gadget id="calculator">12*12</gadget>
<output>144</output>
144.

<result>144</result>