The distance between A and B is 240 meters. Each branch of the little hedgehog is 8 meters, and each branch of the little snail is 7 meters. They set off from A and B respectively at the same time and walk toward each other. How many minutes before they meet?
甲、乙两地相距240米．小刺猬每分行8米，小蜗牛每分行7米，它们分别同时从甲乙两地出发，相向而行．它们经过多少分可相遇？
<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">240 / 15</gadget>
<output>16</output>

<result>16</result>