Xiao Ming took out 12 table tennis balls from a box, accounting for (2/3) of the total, how many table tennis balls are there in the box.
小明从一个盒子里拿出12个乒乓球，占总数的(2/3)，盒子里还有多少个乒乓球．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 / (2/3)</gadget>
<output>18</output>

<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<result>6</result>