Teacher Wang has 400 yuan. She bought 15 tubes of badminton at 25 yuan each. How much money is left?
王老师有400元，她买了15筒羽毛球，每筒25元，还剩多少钱？
<gadget id="calculator">25 * 15</gadget>
<output>375</output>

<gadget id="calculator">400 - 375</gadget>
<output>25</output>

<result>25</result>