A 32-meter-long bamboo pole is sawed into 4-meter-long pieces, and it takes 3 minutes to saw each time. How many minutes does it take in total?
一根32米长的竹竿，把它锯成4米长的小段，每锯一次用3分钟，一共用了多少分钟？
<gadget id="calculator">32 / 4</gadget>
<output>8</output>

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

<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<result>21</result>