Xiao Guo and Xiao Ming's house are on the east and west sides of the school respectively, and they left school at the same time to go home. Xiao Guo walked 70 meters per minute, and Xiao Ming walked 75 meters per minute. After 6 minutes, the two arrive at home at the same time. How many meters are there between the two?
小郭和小明家分别在学校的东西两面，两人同时离校回家，小郭每分钟走70米，小明每分钟走75米．经过6分钟两人同时到家，两家相距多少米？
<gadget id="calculator">70 * 6</gadget>
<output>420</output>

<gadget id="calculator">75 * 6</gadget>
<output>450</output>

<gadget id="calculator">420 + 450</gadget>
<output>870</output>

<result>870</result>