A piece of wood is 60 decimeters long, and it takes 3 minutes to saw it into sticks with a length of 6 decimeters. How many minutes will it take to saw all of them?
一根木头长60分米，要锯成6分米长的木棍，每锯完一次要3分钟，全部锯完需要多少分钟．
<gadget id="calculator">60 / 6</gadget>
<output>10</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>