John decides to fix a racecar.  It cost $20,000 to fix but he gets a 20% discount.  He wins his first race but only keeps 90% of the money.  The prize is $70,000.  How much money did he make from the car?
He gets a 20000*.2=$
<gadget id="calculator">20000*.2</gadget>
<output>4_000</output>
4000 discount.
So he paid 20000-4000=$
<gadget id="calculator">20000-4000</gadget>
<output>16_000</output>
16000.
He kept 70000*.9=$
<gadget id="calculator">70000*.9</gadget>
<output>63_000</output>
63000.
So he made 63,000-16,000=$
<gadget id="calculator">63000-16000</gadget>
<output>47_000</output>
47,000.

<result>47_000</result>