A train with a length of 500 meters travels at a constant speed on the railway, and it takes 17 seconds to pass through a tunnel with a length of 1200 meters. Find the speed of the train.
一列长500米的火车在铁道上匀速行驶，经过一条长1200米隧道用时17秒，求这列火车速度．
<gadget id="calculator">1_200 + 500</gadget>
<output>1_700</output>

<gadget id="calculator">1_700 / 17</gadget>
<output>100</output>

<result>100</result>