It takes Xiaohong 1 hour to walk from home to school every day. Once, she increased her speed by 7 m/min in the first 25 minutes, so she could arrive at school on time by reducing her speed by how much m/min in the remaining time.
小红每天从家走到学校需要1小时．有一次，她在前25分钟比平时速度提高7米/分，那么她在余下时间内比平时速度减少多少米/分，就能准时到校．
<gadget id="calculator">25 * 7</gadget>
<output>175</output>

<gadget id="calculator">175 / 35</gadget>
<output>5</output>

<result>5</result>