(Jiangsu college entrance examination question in 2006) Now there are 2 red balls, 3 yellow balls, and 4 white balls. Balls of the same color are not distinguished. How many different ways are there to arrange these 9 balls in a row? (answer with numbers)
(2006年江苏高考题)今有2个红球、3个黄球、4个白球，同色球不加以区分，将这9个球排成一列，有多少种不同方法．(用数字作答)
<gadget id="calculator">126 * 10</gadget>
<output>1_260</output>

<result>1_260</result>