There is a circular runway. A and B start from one point at the same time and run in the same direction along the runway. When A finishes 3 laps and arrives at the starting point, he just catches up with B for the first time. If they ride bicycles, every second The clock is 6 meters faster, then A happens to catch up with B for the first time after riding 6 laps, how many meters does B run per second?
有一个圆形跑道，甲、乙二人同时从一点出发，沿跑道向同一方向跑动，当甲跑完3圈到达出发点时恰好第一次追上乙，如果两人骑上自行车，每秒钟都快了6米，那么甲骑完6圈时恰好第一次追上乙，那么乙每秒钟跑多少米．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) * 6</gadget>
<output>36/5 = around 7.2</output>

<gadget id="calculator">(36/5) - 6</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) - (6/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(6/5) / (3/10)</gadget>
<output>4</output>

<result>4</result>