There are 6 black balls, 2 basketballs, and 2 white balls in the box, so that the probability of touching the basketball is (1/3), how many basketballs should be put into the box.
箱子里有6个黑球，2个篮球，2个白球，要使摸到篮球的可能性是(1/3)，应再向箱子中放入多少个篮球．
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

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

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">8 / (2/3)</gadget>
<output>12</output>

<gadget id="calculator">6 + 2 + 2</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>