A liquid medicine is prepared according to the ratio of medicine powder and water 1:25. Now 15 grams of medicine powder is used to prepare such a medicine, how many grams of water need to be added? (Solve with ratio)
一种药水是按药粉和水的比1：25配制成的．现在用药粉15克来配制这样的药水，需要加水多少克？(用比例解)
<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">15 / (1/25)</gadget>
<output>375</output>

<result>375</result>