The store plans to transport sports equipment for a student sports meeting in a certain area. If it is transported 10 times by car A, it can be finished; if it is transported 15 times by car B, it can be finished. Now use two vehicles A and B to transport together, how many times will it take to finish the transportation?
商店计划为某地区学生运动会运送体育器材，若用甲汽车运10次可以运完；若用乙汽车15次可以运完．现在用甲、乙两车合运，要几次运完？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) + (1/15)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<result>6</result>