A and B start from two places A and B at the same time and walk toward each other. They meet for the first time at 800 meters from A. After meeting, they continue to move forward. They return immediately when they reach the destination. They meet for the second time at 1,000 meters from B. How many meters away are the grounds?
甲乙两人同时从AB两地出发相向而行，第一次在离A地800米处相遇，相遇后继续前进，到达目的地立即返回，在离B地1000米处第二次相遇，AB两地相距多少米？
<gadget id="calculator">800 * 3</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 - 1_000</gadget>
<output>1_400</output>

<result>1_400</result>