The distance between Xiao Hua and Xiao Ming is 400 meters. They start from home at the same time and walk in the same direction on the same road.
小花和小明两家相距400米，两人同时从家中出发在同一条路上同向而行，小花每分钟行60米，小明每分钟行70米，3分钟后两人相距多少米．
<gadget id="calculator">70 - 60</gadget>
<output>10</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">400 - 30</gadget>
<output>370</output>

<result>370</result>