There are 40 yellow table tennis balls. Take out (1/5) of them and put them into the white table tennis balls. At this time, there are the same number of balls in the two piles. How many white table tennis balls are there?
有40个黄色乒乓球，拿出它的(1/5)放入白色乒乓球中，这时两堆球的个数一样多，白色乒乓球有多少个？
<result>30</result>