A piece of wood is 18 meters long, and it is sawed into small pieces with a length of 6 meters each. It takes 7 minutes to saw each time. How many minutes does it take in total?
一根木头长18米，锯成每段长6米的小段，每锯一次需要7分钟，共需要多少分钟？
<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<result>14</result>