15 monkeys were divided into peaches, and each monkey got 8 peaches on average. Later, some monkeys came and redistributed. Each monkey only got 5 peaches on average. How many monkeys came again?
15只猴子分桃子，每只猴子平均分得8个，后来又来了一些猴子，就重新分配，每只猴子平均只分得5个，又来了多少只猴子？
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">15 * (8/5)</gadget>
<output>24</output>

<gadget id="calculator">24 - 15</gadget>
<output>9</output>

<result>9</result>