It took 15 minutes for Xiaoliang's home to go to school for 2100 meters. How many meters did Xiaoliang walk per minute? (Write out the quantitative relationship first and then answer it)
小亮家到学校2100米，用了15分钟，小亮每分钟走多少米？(先写出数量关系式再解答)
<gadget id="calculator">2_100 / 15</gadget>
<output>140</output>

<result>140</result>