James takes 20 units per semester at community college.  If each unit costs $50 how much does he pay for 2 semesters?
He pays 20*50=$
<gadget id="calculator">20*50</gadget>
<output>1_000</output>
1000 per semester.
So he pays 1000*2=$
<gadget id="calculator">1000*2</gadget>
<output>2_000</output>
2000.

<result>2_000</result>