It took Xiao Ming 1.6 minutes to walk from the first floor to the fifth floor. At the same speed, how many minutes would it take to go from the first floor to the eighth floor?
小明从一楼走到五楼用了1.6分钟，以同样的速度，从一楼到八楼要用多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1.6 / 4</gadget>
<output>0.4</output>

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

<gadget id="calculator">0.4 * 7</gadget>
<output>2.8</output>

<result>2.8</result>