Jenny is working on a school project. She spends 10 hours doing research for the project and 2 hours writing a proposal. If she has 20 hours total to work on the project, how many hours does she have left to write her report?
So far, Jenny has spent 10+2=
<gadget id="calculator">10+2</gadget>
<output>12</output>
12 hours on the project.
Thus, she has 20-12=
<gadget id="calculator">20-12</gadget>
<output>8</output>
8 hours to write her report.

<result>8</result>