Add 20g of salt to 80g of water, what is the percentage of salt in the brine
在80g水中加入20g盐，盐占盐水的多少
<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>