The house is 20.5 feet by 10 feet. The porch measures 6 feet by 4.5 feet. The house and the porch need shingles. How many square feet of shingles will be needed to roof the house and the porch?
House = 20.5 * 10 = 
<gadget id="calculator">20.5*10</gadget>
<output>205</output>
205 square feet.
Porch = 6 * 4.5 = 
<gadget id="calculator">6*4.5</gadget>
<output>27</output>
27 square feet
205 + 27 = 
<gadget id="calculator">205+27</gadget>
<output>232</output>
232 square feet
232 square feet of shingles will be needed.

<result>232</result>