A piece of wood with a length of 20 meters and a square cross-section is sawn into 5 sections on average. If the time required for each sawing is the same, what fraction of the time is spent for each sawing in the total time?
把一根长20米、横截面是正方形的木料，平均锯成5段，如果每锯一次所用的时间相同，那么每锯一次所用的时间占全部时间的几分之几？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>