There are only 5 red balls in the pocket, and one is randomly touched, so that the possibility of drawing a red ball is (1/12), how many balls of other colors must be put in the pocket.
口袋中只有5个红球，任意摸1个，要使摸出的红球的可能性是(1/12)，还要往口袋中放多少个其他颜色的球．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">5 / (1/12)</gadget>
<output>60</output>

<gadget id="calculator">60 - 5</gadget>
<output>55</output>

<result>55</result>