Teacher Li takes 100 yuan to the mall, buys a table tennis racket and spends 58.5 yuan, and buys a stationery box 23.8 yuan. How much money does Mr. Li have left?
李老师带100元钱去商场，买乒乓球拍用去58.5元，买文具盒用去23.8元，李老师还剩多少钱？
<gadget id="calculator">100 - 58.5 - 23.8</gadget>
<output>17.7</output>

<result>17.7</result>