Xiao Zhang and Xiao Li run in opposite directions at the same place on a 400-meter circular runway at the same time. Xiao Zhang runs 6 meters per second and meets Xiao Li after 25 seconds. How many meters does Xiao Li run per second?
小张和小李在400米的环形跑道上的同一地点同时向相反方向跑步，小张每秒跑6米，25秒后与小李相遇．小李每秒跑多少米？
<gadget id="calculator">400 / 25</gadget>
<output>16</output>

<gadget id="calculator">16 - 6</gadget>
<output>10</output>

<result>10</result>