Liangliang puts two red, blue and black glass balls of the same size and different colors into the box. Liangliang touches a ball and then puts it back. He touches a ball 48 times in total, how many times can he touch the black ball.
亮亮在盒子中放入大小相同、颜色不同的红、蓝、黑玻璃球各两个，亮亮摸一个球后再放回去，他一共摸了48次，可能摸到黑球多少次．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">48 * (1/3)</gadget>
<output>16</output>

<result>16</result>