If it takes 30 minutes to saw a piece of wood into 6 sections, how many minutes will it take to saw it into 8 sections?
把一根木料锯成6段需30分钟，锯成8段需要多少分钟．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

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

<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<result>42</result>