48 cm iron rod is sawed into a short 8 cm iron rod. If it takes 4 minutes to saw a section, how many minutes will it take to saw the iron rod?
把一根48厘米的铁棒锯成8厘米的短铁棒，如果锯一段需要4分钟，锯完这根铁棒需要多少分钟．
<gadget id="calculator">48 / 8</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>