There are 5 red balls and 3 white balls in the bag, put at least how many more white balls, if you touch 1 ball at random, the possibility of touching a red ball is as high as that of a white ball.
袋子里有5个红球和3个白球，至少再放多少个白球，任意摸1个球，摸到红球和白球的可能性一样大．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<result>2</result>