A king gets a crown made that costs $20,000.  He tips the person 10%.  How much did the king pay after the tip?
The tip was 20000*.1=$
<gadget id="calculator">20000*.1</gadget>
<output>2_000</output>
2000.
So the total cost was 2000+20000=$
<gadget id="calculator">2000+20000</gadget>
<output>22_000</output>
22000.

<result>22_000</result>