The 12 little monkeys were divided into peaches, and each person was allocated 5. Now a few more monkeys came, and everyone redistributed. On average, each monkey gets 4 peaches. How many monkeys came again.
12只小猴分桃，每人分到5只，现在又来了几只猴子，大家重新分配．平均每只猴子分到4只桃子．又来了多少只猴子．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">12 * (5/4)</gadget>
<output>15</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<result>3</result>