It takes 3 times to saw a wooden stick into equal-length segments, and each sawing takes 5 minutes. What is the total length of each segment?
一根木棒把它锯成等长的段要锯3次，每锯一次用5分钟，每段是全长的多少．
<gadget id="calculator">3 + 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>