It takes Xiaodong 8 minutes to go from the first floor to the fifth floor. Uncle Wang’s speed is half of Xiaodong’s. Uncle Wang lives on the seventh floor. How many minutes does it take for Uncle Wang to get home from the first floor?
小东从一楼到五楼需要用8分钟，王大伯的速度是小东速度的一半，王大伯住7楼，王大伯从一楼到家共需几分钟？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">2 * 2 * 6</gadget>
<output>24</output>

<result>24</result>