It takes 20 minutes for a woodworker to saw a log into 5 pieces. According to this calculation, how many minutes will it take to saw this log into 8 sections? (Solve with ratio)
木工将一段圆木锯成5段需20分钟．照这样计算，将这段圆木锯成8段，需要多少分钟？(用比例解)
<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<gadget id="calculator">160 - 20</gadget>
<output>140</output>

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

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<result>35</result>