There are 6 red balls and 2 white balls in a box. If one ball is randomly drawn from it, what is the probability of drawing a white ball?
箱子里有6个红球、2个白球，从中任意摸出一个球，摸出白球的可能性是多少．
<gadget id="calculator">2 + 6</gadget>
<output>8</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>