A bag of cheese with a net content of 200 grams contains an average of 21 grams of protein per 100 grams. What percentage is the protein content of this cheese?
一袋净含量为200克的奶酪，平均每100克含蛋白质21克，这种奶酪的蛋白质含量为百分之几？
<gadget id="calculator">21 / 100</gadget>
<output>21/100 = around 0.21</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(21/100) * 1</gadget>
<output>21/100 = around 0.21</output>

<result>21/100 = around 0.21</result>