A piece of wood with a length of 80 decimeters is sawed into 8 sections, and each section takes 5 minutes to saw. How many minutes did it take to saw all of them?
一根长80分米的木头锯成8段，每锯一段用时5分钟．全部锯完用多少分钟？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<result>35</result>