Mom brought 30 yuan to the vegetable market, 15.8 yuan for meat and 9.45 yuan for vegetables, how much money is left?
妈妈去菜场带了30元钱，买肉用了15.8元，买菜用了9.45元，还剩下多少元？
<gadget id="calculator">15.8 + 9.45</gadget>
<output>25.25</output>

<gadget id="calculator">30 - 25.25</gadget>
<output>4.75</output>

<result>4.75</result>