53% of eggs are protein, how many kilograms of protein are there in 40 kg of eggs?
鸡蛋中的53%是蛋白，40千克鸡蛋中有蛋白多少千克．
<gadget id="calculator">53 / 100</gadget>
<output>53/100 = around 0.53</output>

<gadget id="calculator">40 * (53/100)</gadget>
<output>106/5 = around 21.2</output>

<result>106/5 = around 21.2</result>