A medicine requires 0.6 grams of medicine to be mixed with 1.5 grams of water. According to this calculation, how many kilograms of medicine are needed to mix 6 kilograms of water.
一种药水需要0.6克药配1.5克水，照这样计算，配6千克水需要多少千克的药．
<gadget id="calculator">6 * 0.6</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 / 1.5</gadget>
<output>2.4</output>

<result>2.4</result>