Teacher Li does outdoor exercise every morning. On the first day, he runs 2000 meters and walks 1000 meters, which takes 24 minutes. On the second day, he runs 3000 meters and walks 500 meters, which takes 22 minutes. Mr. Li's speed is always the same when running, and the speed is always the same when walking. What is the running speed of Mr. Li in meters per minute?
李老师每天早上做户外运动，第一天他跑步2000米，散步1000米，共用24分钟，第二天他跑步3000米，散步500米，共用22分钟．李老师跑步时的速度总是一样的，散步时的速度也总是一样的．李老师跑步的速度是每分钟多少米．
<gadget id="calculator">3_000 + 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">24 - 22</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">24 - 4</gadget>
<output>20</output>

<gadget id="calculator">4_000 / 20</gadget>
<output>200</output>

<result>200</result>