A kind of potion has a drug content of 6%. After adding 480 grams of water, it becomes a potion with a content of 4%. How many grams of the potion are there?
一种药水的含药率是6%，加了480克水后，变成含率是4%的药水，原来有药水多少克？
<gadget id="calculator">19.2 / 0.02</gadget>
<output>960</output>

<result>960</result>