From the East Village to the West Village, A has to travel for 15 minutes, and B has to travel for 12 minutes. The two are walking towards each other from the two places. A few minutes after A and B set off, they meet?
东村到西村，甲要行15分钟，乙要行12分钟，两人分别从两地相向而行，甲、乙出发后几分钟两人相遇？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

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

<gadget id="calculator">(1/15) + (1/12)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 / (3/20)</gadget>
<output>20/3 = around 6.666667</output>

<result>20/3 = around 6.666667</result>