Mom brought 25.8 yuan, bought a pen and spent 13.5 yuan, how much money does mother have left?
妈妈带了25.8元，买了一支钢笔用了13.5元，妈妈还剩多少元？
<gadget id="calculator">25.8 - 13.5</gadget>
<output>12.3</output>

<result>12.3</result>