Teacher Zhang does outdoor exercise every morning. On the first day, he runs 2000 meters and walks 1000 meters for 24 minutes; on the second day he runs 3000 meters and walks 500 meters for 20 minutes. Assuming that Mr. Zhang’s running speed is always the same, and his walking speed is always the same, how many meters is Mr. Zhang’s running speed?
张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20分钟．假设张老师跑步的速度总是一样的，散步的速度也总是一样的，求张老师跑步的速度是多少米？
<gadget id="calculator">3_000 * 2</gadget>
<output>6_000</output>

<gadget id="calculator">6_000 - 2_000</gadget>
<output>4_000</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">40 - 24</gadget>
<output>16</output>

<gadget id="calculator">4_000 / 16</gadget>
<output>250</output>

<result>250</result>