disinfectant is prepared by mixing liquid medicine and water at a ratio of 1:20. Now there are 300 grams of liquid medicine, how many kilograms of water need to be added to prepare this disinfectant? (Solve it any way you like)
一种消毒液是药液和水按1：20配制而成的．现在有300克药液，要配制成这种消毒药水，需加水多少千克？(用你喜欢的方法解决)
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">300 / (1/20) / 1_000</gadget>
<output>6</output>

<result>6</result>