Liangliang goes to school, if he walks 40 meters per minute, he will arrive at school on time at 8:00; if he walks 50 meters per minute, he will arrive at school at 7:55. How many meters is the distance between Liangliang's home and school?
亮亮上学，若每分钟行40米，则8：00准时到校；若每分钟行50米，则7：55到校．亮亮的家与学校的距离是多少米．
<gadget id="calculator">5 * 50</gadget>
<output>250</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">250 / 10</gadget>
<output>25</output>

<gadget id="calculator">25 * 40</gadget>
<output>1_000</output>

<result>1_000</result>