I have 50 yuan, and I spent 18.60 yuan on a pencil sharpener. How much money do I have left?
我有50元，买一个卷笔刀用了18.60元，还剩多少元？
<gadget id="calculator">50 - 18.6</gadget>
<output>31.4</output>

<result>31.4</result>