Lele goes to grandpa's house by bicycle. If the speed is 20% higher than usual, you can arrive at grandpa's house 5 minutes earlier. If you ride 40 meters less per minute, you will have to ride 5 minutes longer than usual. How many meters does Lele usually ride per minute?
乐乐骑自行车去爷爷家．如果车速比平时提高20%，则可以提前5分钟到达爷爷家，如果每分钟少骑40米，则要比平时多骑5分钟．乐乐平时每分钟骑多少米？
<gadget id="calculator">0 + 1_400</gadget>
<output>1_400</output>

<gadget id="calculator">1_400 / 5</gadget>
<output>280</output>

<result>280</result>