A box of apples is 75 yuan, a total of 15 kilograms, I want to buy 5 kilograms, how much should I pay?
一箱苹果75元，共15千克，我要买5千克，需要付多少钱？
<gadget id="calculator">75 / 15</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>