There are 12 red balls, 8 yellow balls and some green balls in a box, and a ball is randomly drawn from it. If the probability of picking out a yellow ball is less than (1/3), then at least how many green balls are there ．
在一个盒子里有12个红球，8个黄球和一些绿球，任意从里面摸出一个球，结果要是拿出黄球的可能性小于(1/3)，那么至少有多少个绿球．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / (1/3)</gadget>
<output>24</output>

<gadget id="calculator">1 - 12 - 8</gadget>
<output>-19</output>

<gadget id="calculator">24 + (-19)</gadget>
<output>5</output>

<result>5</result>