Mom brought 100 yuan, bought bananas and spent 15.8 yuan, bought apples and spent 14.2 yuan, how much money is left?
妈妈带了100元钱，买香蕉花了15.8元，买苹果花了14.2元，还剩多少钱？
<gadget id="calculator">15.8 + 14.2</gadget>
<output>30</output>

<gadget id="calculator">100 - 30</gadget>
<output>70</output>

<result>70</result>