A train is 200 meters long, it takes 42 seconds to pass through a 430-meter tunnel, and it takes 25 seconds to pass a certain platform at the same speed. How long is this platform?
一列火车长200米，通过一条长430的隧道用了42秒，以同样的速度通过某站台用25秒，这个站台长多少米？
<gadget id="calculator">430 + 200</gadget>
<output>630</output>

<gadget id="calculator">630 / 42</gadget>
<output>15</output>

<gadget id="calculator">15 * 25</gadget>
<output>375</output>

<gadget id="calculator">375 - 200</gadget>
<output>175</output>

<result>175</result>