During the 800-meter race, Li Ming and Tian Liang started from the starting line at the same time. After 2 minutes, Tian Liang fell 180 meters behind Li Ming, Tian Liang ran 210 meters per minute, how many meters per minute did Li Ming run?
八百米赛跑时，李明和田亮同时从起跑线出发．经过2分钟以后，田亮落在李明后面180米，田亮每分钟跑210米，李明每分钟跑多少米？
<gadget id="calculator">210 * 2</gadget>
<output>420</output>

<gadget id="calculator">420 + 180</gadget>
<output>600</output>

<gadget id="calculator">600 / 2</gadget>
<output>300</output>

<result>300</result>