Both A and B take the same amount of food to explore the wild. The food brought by A can last for A for 10 days, and the food brought by B can last for B for 15 days. Now they set off at the same time and start to eat their own food. After A finishes eating his own food, he will eat the food brought by B. How many days can A and B spend in the wild?
A、B两人带同样多的食物到野外探险，A带的食物可供A吃10天，B带的食物可供B吃15天．现在两人同时出发，开始各自吃自已的食物，当A吃完自已的食物后再吃B带的食物，请问A、B两人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>