It takes 6 minutes to saw a 4-meter-long wooden stick into 3 small pieces of the same length. How many minutes does it take to saw it into 6 pieces of the same length?
把一根4米长的木棒锯成同样长3小段，需要6分钟，锯成同样长的6段，需要多少分钟．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>