It takes Xiao Ming 4 minutes to run from the first floor to the fifth floor, Xiao Fang's speed is half of Xiao Ming's, how many minutes does it take Xiao Fang to run from the first floor to the fourth floor?
小明从一楼跑到五楼需要4分钟，小芳的速度是小明的一半，小芳从一楼跑到四楼需要多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

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

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

<result>6</result>