Two people, A and B, start from the same place on the ring road at the same time by bicycle, walking with their backs facing each other. Now it is known that the time for A to walk around is 70 minutes. If A and B meet each other 45 minutes after departure, how many minutes does it take for B to walk around.
甲、乙二人骑自行车从环形公路上同一地点同时出发，背向而行．现在已知甲走一圈的时间是70分钟．如果在出发后第45分钟甲、乙二人相遇，那么乙走一圈的时间是多少分钟．
<gadget id="calculator">70 - 45</gadget>
<output>25</output>

<gadget id="calculator">70 / 25</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(14/5) * 45</gadget>
<output>126</output>

<result>126</result>