How many minutes will it take to saw a piece of wood 20 meters long into 5 identical sections, each section needs 8 minutes.
把一根长20米的木头锯成相同的5段，每锯一段用8分钟，共需要多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

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

<result>32</result>