The length of a piece of wood is 2 meters. Master Li intends to saw it into a round pier with a thickness of 8 cm. It takes 3 minutes for each cut. How many minutes will it take to saw the whole piece of wood?
一根木头的长是2米，李师傅打算把它锯成8厘米厚的圆墩，每锯断一次用3分钟，把这根木头全部锯开需要多少分钟？
<gadget id="calculator">100 / 8</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">2 * (25/2)</gadget>
<output>25</output>

<gadget id="calculator">25 - 1</gadget>
<output>24</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<result>72</result>