The master worker saws a 3-meter-long cylindrical steel bar, and it takes 1 hour and 20 minutes to saw 5 sections. How many minutes would it take to saw such a steel bar into 5 decimeter long pieces?
工人师傅锯一条3米长的圆柱体的钢条，锯5段耗时1小时20分．如果把这样的一根钢条锯成5分米长的小段需要多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

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

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>