Teacher Li spent 139 yuan to buy books for the school and 97 yuan to buy sports equipment. He brought 300 yuan. How much money is left now?
李老师给学校买图书用了139元，买体育器材用了97元，他带了300元钱，现在还剩下多少钱？
<gadget id="calculator">139 + 97</gadget>
<output>236</output>

<gadget id="calculator">300 - 236</gadget>
<output>64</output>

<result>64</result>