A group of monkeys eat peaches, if each monkey eats 5 peaches, there will be 7 peaches left; if each monkey eats 7 peaches, there will be 5 less peaches. How many monkeys are there in total?
一群猴子分桃吃，如果每只猴子吃5个，还剩7个；如果每只猴子吃7个，就少5个．这群猴子一共有多少只？
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>