A kind of assorted candy is made by mixing 2 parts toffee, 5 parts fruit sugar and 3 parts fudge. How many kilograms of fruit sugar is needed to prepare 40kg of such assorted candies?
一种什锦糖是按2份奶糖、5份水果糖和3份软糖混合成的．要配制这样的什锦糖40kg，需要水果糖多少千克？
<gadget id="calculator">2 + 5 + 3</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 * (1/2)</gadget>
<output>20</output>

<result>20</result>