Net weight of a bucket of milk powder: 800 grams, protein content: 25%. How many grams of protein are there?
一桶奶粉净重：800克，蛋白质含量：25%．问蛋白质有多少克？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">800 * (1/4)</gadget>
<output>200</output>

<result>200</result>