salt water is prepared according to the ratio of salt to water 1:20, how many grams of water should be added to 10 grams of salt.
一种盐水按照盐与水1：20的比例配制而成，10克盐应加水多少克．
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">10 / (1/20)</gadget>
<output>200</output>

<result>200</result>