Xiaoming's home is 400 meters east of the school, and Xiaohong's home is 200 meters west of Xiaoming's home, so how many meters is Xiaohong's home from the school?
小明的家在学校东400米处，小红的家在小明家的西200米处，那么小红的家距离学校多少米．
<gadget id="calculator">400 - 200</gadget>
<output>200</output>

<result>200</result>