A and B are running at their respective speeds on a circular playground. If they run opposite each other from the same place at the same time, they meet for the first time after running for 8 minutes. It takes 12 minutes for A to run for a week, how much time does B take for a week?
甲乙两人在环形操场上以各自的速度跑步，如果两人同时从同一地点相背而行，跑了8分钟两人第一次相遇．甲跑一周要12分钟，乙跑一周要多少时间？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) - (1/12)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">1 / (1/24)</gadget>
<output>24</output>

<result>24</result>