On a 400-meter circular runway, two people, A and B, start running at the same time. If they are running in the same direction, they will meet in 3 minutes and 20 seconds. If they are running in the opposite direction, they will meet in 40 seconds. If A is faster than B, what is the speed of A?
在400米的环形跑道上，甲乙两人同时同地起跑，如果同向而行，3分20秒相遇，如果背向而行，则40秒相遇．已知甲比乙快，则甲的速度是多少．
<gadget id="calculator">400 / 40</gadget>
<output>10</output>

<gadget id="calculator">400 / 200</gadget>
<output>2</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>