Madison makes 30 paper boats and sets them afloat. 20% are eaten by fish and Madison shoots two of the others with flaming arrows. How many boats are left?
First find the number of boats eaten by fish: 30 boats * 20% = 
<gadget id="calculator">30*20*.01</gadget>
<output>6</output>
6 boats.
Then subtract the two groups of boats that were destroyed from the original number to find the number left: 30 boats - 6 boats - 2 boats = 
<gadget id="calculator">30-6-2</gadget>
<output>22</output>
22 boats.

<result>22</result>