Xiaoya and Xiaopang walk around the playground with a circumference of 250 meters. Xiaopang walks about 1.5 meters per second, and Xiaoya walks about 1 meter per second. The two start from the same place at the same time in the opposite direction. People meeting for the first time?
小亚和小胖两人围绕一周为250米的操场散步，小胖每秒约走1.5米，小亚每秒约走1米，两人同时从同一地点反向出发，约几秒钟后两人第一次相遇？
<gadget id="calculator">1.5 + 1</gadget>
<output>2.5</output>

<gadget id="calculator">250 / 2.5</gadget>
<output>100</output>

<result>100</result>