It takes 12 minutes to saw a log into 4 sections, how much time will it take to saw 7 sections at the same speed
将一根圆木锯成4段需要12分钟，以同样的速度锯成7段需要多少
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>