Jimmy bought 3 pens for school for $1 each, 4 notebooks for $3 each and 2 folders for $5 each. If he paid with a $50 bill, how much change will he get back?
Jimmy spent 3 * $1 = $
<gadget id="calculator">3*1</gadget>
<output>3</output>
3 on pens.
He spent 4 * $3 = $
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 on notebooks.
He spent 2 * $5 = $
<gadget id="calculator">2*5</gadget>
<output>10</output>
10 on folders.
He spent $3 + $12 + $10 = $
<gadget id="calculator">3+12+10</gadget>
<output>25</output>
25 in total.
His change will be $50 - $25 = $
<gadget id="calculator">50-25</gadget>
<output>25</output>
25.

<result>25</result>