There are 5 black balls and 3 white balls in a box, if you touch a ball at random, what is the probability of getting a white ball
盒子里有5个黑球和3个白球，任意摸一个球，摸到白球的概率为多少
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>