Now there are two kinds of balls, green and yellow, and 12 balls should be put into the pocket, so that the probability of touching the green ball is (5/6), how many green balls should be put into the pocket.
现在有绿、黄两种球，要放入口袋12个球，使摸到绿球的可能性是(5/6)，则要放入多少个绿球．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">12 * (5/6)</gadget>
<output>10</output>

<result>10</result>