Put 20 grams of salt in 80 grams of water, how much salt is salt water.
在80克水放入20克盐，盐是盐水的多少．
<gadget id="calculator">20 + 80</gadget>
<output>100</output>

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

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