A gym charges its members $18 twice a month.  If it has 300 members how much does it make a month?
Each person is charged 18*2=$
<gadget id="calculator">18*2</gadget>
<output>36</output>
36 per month.
So they get 36*300=$
<gadget id="calculator">36*300</gadget>
<output>10_800</output>
10,800 per month.

<result>10_800</result>