A and B start from two places at the same time and walk toward each other. A takes 60 minutes to complete the journey, and B takes 40 minutes to complete the journey. 5 minutes after departure, A returned to the starting point because he forgot to bring something, and was delayed for another 5 minutes to pick up the things. How long did it take for the two to meet after A set off again?
甲、乙二人同时从两地出发，相向而行．走完全程甲需60分钟，乙需40分钟．出发后5分钟，甲因忘带东西而返回出发点，取东西又耽误了5分钟．甲再出发后多长时间两人相遇？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">3 * 5 * (1/40)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/60) + (1/40)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(5/8) / (1/24)</gadget>
<output>15</output>

<result>15</result>