The probability of finding a white ball in a box containing 8 balls is (3/8), how many white balls should be placed in the box if the balls are the same except for their color.
要想在装有8个球的盒子里摸到白球的可能性为(3/8)，球除颜色外均相同，在盒子里要放多少个白球．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">8 * (3/8)</gadget>
<output>3</output>

<result>3</result>