liquid medicine is prepared according to the ratio of medicine powder and water 1:5000. Now 30 grams of medicinal powder is prepared into such a liquid medicine, how many kilograms of water need to be added? (Solve with ratio)
一种药水是按药粉和水的比1：5000配制成的．现在用药粉30克配制成这样的药水，需要加水多少千克？(用比例解)
<gadget id="calculator">1 / 5_000</gadget>
<output>1/5_000 = around 0.0002</output>

<gadget id="calculator">30 / (1/5_000) / 1_000</gadget>
<output>150</output>

<result>150</result>