Xiao Ming's home is 1000 meters away from the school. After Xiao Ming walked to school for 15 minutes, he was still 100 meters away from the school. How many meters does Xiao Ming walk on average per minute?
小明家距离学校1000米，小明上学走了15分钟后，离学校还有100米．小明平均每分钟走多少米？
<gadget id="calculator">1_000 - 100</gadget>
<output>900</output>

<gadget id="calculator">900 / 15</gadget>
<output>60</output>

<result>60</result>