It takes 24 minutes to saw a piece of wood with a length of 2 meters into a section of 0.5 meters. According to this calculation, how many minutes will it take to saw a section of 0.4 meters.
一条长2米的木料，锯成0.5米一段，要24分钟，照这样计算，锯成0.4米一段要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">24 / 3</gadget>
<output>8</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>