If a student walks from home to school at a speed of 50 meters per minute, he will be late for 8 minutes; if he walks at a speed of 60 meters per minute, he can arrive at school 5 minutes earlier. minute.
一学生从家到学校，如果以每分钟50米的速度行走，就要迟到8分钟；如果以每分钟60米的速度前进，就可以提前5分钟到校，这个学生出发时离上学时间有多少分钟．
<gadget id="calculator">50 * 8</gadget>
<output>400</output>

<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">400 + 300</gadget>
<output>700</output>

<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<gadget id="calculator">700 / 10</gadget>
<output>70</output>

<result>70</result>