It takes 40 minutes to saw a piece of steel with uniform thickness into 9 sections. How many minutes does it take to saw each section on average?
把一根粗细均匀的钢材锯成了9段，需40分钟，平均每锯一段需多少分钟．
<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<result>5</result>