Divide a line segment with a length of 1 meter into 5 segments on average, of which 4 segments are the number of this line segment.
把一条长1米的线段平均分成5段，其中的4段就是这条线段的多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>