and B carry the same amount of food for a field adventure. The food brought by A can last A 10 days, and the food brought by B can last B 15 days. Now they set off at the same time. At the beginning, they each eat the food they brought. When A finishes eating his own food, he then eats the food brought by B. How many days can the two explore at most in the wild?
甲、乙二人带着同样多的食物进行野外探险，甲带的食物可供甲吃10天，乙带的食物可供乙吃15天．现在两人同时出发，开始时各自吃自己带的食物，当甲吃完自己的食物后再吃乙带的食物，那么两人最多能在野外探险多少天？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) * 10</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/3) / (1/6)</gadget>
<output>2</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<result>12</result>