Xiaofen's house is on the east side of the school, and Xiaogang's house is on the west side of the school. They both left school and went home at the same time. Xiaofen walked 80 meters per minute, and Xiaogang walked 70 meters per minute. After 4 minutes, they both returned home at the same time. How many meters are there between them?
小芬家在学校东面，小刚家在学校西面，两人同时离校回家．小芬每分钟行80米，小刚每分钟行70米，经过4分钟，两人同时回到家．他们两家相距多少米？
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">150 * 4</gadget>
<output>600</output>

<result>600</result>