There are two people, A and B. A walks 80 meters per minute, and B walks 72 meters per minute. The two start from A to B at the same time, and B takes 4 minutes longer than A. What is the distance between A and B?
有甲、乙两人．甲每分钟走80米，乙每分钟走72米，两人同时从A地到B地出发，乙比甲多用4分钟．A、B两地相距多少米？
<gadget id="calculator">80 - 72</gadget>
<output>8</output>

<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">72 * (1/2) * 80</gadget>
<output>2_880</output>

<result>2_880</result>