Steve makes 40000$ a year as a teacher.  He loses 20 percent to taxes, 10 percent to healthcare, and 800$ to local union dues.  How much money does Steve take home?
Taxes:40000(.20)=8000$
Healthcare:40000(.10)=4000$
Dues:
<gadget id="calculator">800</gadget>
<output>800</output>
800$
Total:40000-8000-4000-800=
<gadget id="calculator">40000-8000-4000-800</gadget>
<output>27_200</output>
27,200$

<result>27_200</result>