Frank and Bill have $42 and they bought 3 large pizzas with the money. Each pizza cost $11 and Frank paid for all three pizzas. Frank gave the rest of his money to Bill. If Bill had $30 already, how much money does Bill have now?
Frank spent 11*3 = 
<gadget id="calculator">11*3</gadget>
<output>33</output>
33 dollars on pizza.
Frank gives 42-33 = 
<gadget id="calculator">42-33</gadget>
<output>9</output>
9 dollars to Bill.
Bill now has 30+9 = 
<gadget id="calculator">30+9</gadget>
<output>39</output>
39 dollars.

<result>39</result>