Craig has 2 twenty dollar bills. He buys six squirt guns for $2 each.  He also buys 3 packs of water balloons for $3 each.  How much money does he have left?
Craig starts off with 2 * $20 = $
<gadget id="calculator">2*20</gadget>
<output>40</output>
40.
Craig spends 6 squirt guns * $2 = $
<gadget id="calculator">6*2</gadget>
<output>12</output>
12 on squirt guns.
Craig spends 3 packs of water balloons * $3 = $
<gadget id="calculator">3*3</gadget>
<output>9</output>
9 on water balloons.
Total Craig has spent $12 + $9 = $
<gadget id="calculator">12+9</gadget>
<output>21</output>
21.
Craig has $40 - $21 = $
<gadget id="calculator">40-21</gadget>
<output>19</output>
19 remaining.

<result>19</result>