Dissolve 20 grams of salt in 80 grams of water, what is the weight of the salt in the salt water
把20克盐溶化在80克水中，盐的重量占盐水的多少
<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>