Jason and Jeremy want to paint their wall white and agreed to split the cost of the paint. A gallon of paint costs $45 and can cover up to 400 square feet. How much will each of them contribute to the cost of the paint if their walls have a total area of 1600 square feet and will need a second coat?
They need 1600 square feet / 400 square feet/gallon = 
<gadget id="calculator">1600/400</gadget>
<output>4</output>
4 gallons of paint for their walls.
Since they will do a second coating, then they would need 4 gallons x 2 = 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8 gallons in all.
Eight gallons of paint will cost $45/gallon x 8 gallons = $
<gadget id="calculator">45*8</gadget>
<output>360</output>
360.
Thus, Jason and Jeremy will each contribute $360/2 = $
<gadget id="calculator">360/2</gadget>
<output>180</output>
180.

<result>180</result>