To prepare a disinfectant, the ratio of liquid medicine to water is 1:50, the existing liquid medicine is 300 kg, how much water needs to be added?
配制一种消毒药，药液和水的比是1：50，现有药液300千克，需要加水多少千克？
<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">300 / (1/50)</gadget>
<output>15_000</output>

<result>15_000</result>