Saw a wooden stick into 5 sections, has been sawed 3 times, how much of the task has been completed.
把一根木棒锯成5段，已经锯了3次，已经完成了任务的多少．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>