My mother spent 15.8 yuan to buy vegetables after get off work, and there is 24.2 yuan left. How much money did my mother bring?
妈妈下班买菜花了15.8元，还剩24.2元，妈妈带了多少元钱．
<gadget id="calculator">15.8 + 24.2</gadget>
<output>40</output>

<result>40</result>