A and B are running a 400-meter race. When A is 100 meters away from the finish line, B just reaches the midpoint. At this speed, when B reaches the finish line, he is exactly 25 seconds slower than A. How many meters does A run per second on average?
甲乙两人比赛400米跑，甲离终点100米时，乙刚好跑到中点，照这样的速度，乙跑到终点时，比甲正好慢25秒，甲平均每秒跑多少米？
<gadget id="calculator">300 / 200</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / (3/2)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * 25</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(50/3) / (1/3)</gadget>
<output>50</output>

<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<result>8</result>