How many grams of salt are needed to prepare 60 grams of brine with a salt content of 20%.
要配制60克含盐率20%的盐水需要多少克盐．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 * (1/5)</gadget>
<output>12</output>

<result>12</result>