It took Xiaoqiang 1.2 minutes to go from the first floor to the third floor. How many minutes would it take to go from the first floor to the fifth floor at the same speed?
小强从一楼到三楼用了1.2分钟，用同样的速度从一楼到五楼要用多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">1.2 / 2</gadget>
<output>0.6</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">0.6 * 4</gadget>
<output>2.4</output>

<result>2.4</result>