The protein content in soybeans accounts for about (9/25). If there are 2.5 kilograms of soybeans, how many kilograms of protein can be extracted from them?
黄豆中蛋白质含量约占(9/25)，如果有黄豆2.5千克，能从中提取多少千克的蛋白质？
<gadget id="calculator">9 / 25</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">2.5 * (9/25)</gadget>
<output>0.9</output>

<result>0.9</result>