There is a medicine that weighs 20.2 kilograms. The weight ratio of the medicine to water is 1:100. What is the weight of the water in kilograms?
有一种药水重20.2千克，药和水的重量比是1：100，其中水重多少千克．
<gadget id="calculator">100 / 101</gadget>
<output>100/101 = around 0.990099</output>

<gadget id="calculator">20.2 * (100/101)</gadget>
<output>20</output>

<result>20</result>