On a 400-meter circular runway, two points A and B are 100 meters apart. A and B start from two points A and B at the same time and run counterclockwise (A is behind B). A runs 8 meters per second, and B runs 5 meters per second. They both stop for 5 seconds every time they run 100 meters. How many seconds does it take for A to catch up with B?
在400米环形跑道上，A、B两点相距100米，甲、乙两人分别从A、B两点同时出发，按逆时针方向跑步(甲在乙后面)．甲每秒跑8米，乙每秒跑5米，他们俩每跑100米都停5秒，那么甲追上乙需要多少秒？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">100 + 25</gadget>
<output>125</output>

<gadget id="calculator">125 / 3</gadget>
<output>125/3 = around 41.666667</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">(125/3) + 10</gadget>
<output>155/3 = around 51.666667</output>

<result>155/3 = around 51.666667</result>