Charlie wants to sell beeswax candles.  For every pound of beeswax, he can make 10 tapered candles.  One pound of beeswax and the wicks cost $10.00 in supplies.   If he sells each candle for $2.00 each, what is his net profit if he makes and sells 20 candles?
1 pound of beeswax and the wick make 10 candles and he wants to make 20 candles so he needs 20/10 = 
<gadget id="calculator">20/10</gadget>
<output>2</output>
2 pounds of beeswax
1 pound of beeswax costs $10.00 and he needs 2 pounds so his supplies will cost 10*2 = $
<gadget id="calculator">10*2</gadget>
<output>20</output>
20.00.
He wants to sell each candle for $2.00 each and he's selling 20 candles so that's 2*20 = $
<gadget id="calculator">2*20</gadget>
<output>40</output>
40.00.
If he makes $40.00 selling candles and his supplies cost $20.00 then his net profit is 40-20 = $
<gadget id="calculator">40-20</gadget>
<output>20</output>
20.00.

<result>20</result>