In a 40-minute math class, students spend 25% of their time on practice. How much time do students spend on practice?
在一堂40分钟的数学课中，学生操作实践的时间占25%，学生操作实践用了多少时间？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<result>10</result>