Qiqi has folded 30 thousand paper cranes, 60% of which has been completed, and how many are left to be folded.
琪琪折30只千纸鹤，已经完成了60%，还剩下多少只没折好．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 * (2/5)</gadget>
<output>12</output>

<result>12</result>