A liquid medicine, the ratio of liquid medicine to water is 1:200, now there are 75 grams of liquid medicine, how many grams of water should be added.
一种药水，药液和水的比是1：200，现在有药液75克，应加水多少克．
<gadget id="calculator">1 / 200</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">75 / (1/200)</gadget>
<output>15_000</output>

<result>15_000</result>