A pencil uses up its (4/9), what is the remaining full length more than the used one
一枝铅笔用去它的(4/9)，剩下的比用去的多全长的多少
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>