It took 16 minutes to saw a section of wood into 5 sections. How many minutes will it take to saw this log into 8 sections?
明明把一段木料锯成了5段，用了16分钟．把这根木料锯成8段，需多少分钟？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>