cake shop makes a kind of cake. A cake needs to use 2.4 grams of colored cream and 5.7 grams of white cream. One day, 22.8 grams of white cream was used to make this cake. Please calculate how many grams of colored cream are needed?
蛋糕店制作一种蛋糕，一个蛋糕需要用2.4克彩色奶油和5.7克白色奶油．某天制作这种蛋糕用白色奶油22.8克，请你算出彩色奶油要多少克？
<gadget id="calculator">22.8 / 5.7</gadget>
<output>4</output>

<gadget id="calculator">4 * 2.4</gadget>
<output>9.6</output>

<result>9.6</result>