and B are moving toward each other at a constant speed from A and B at the same time. They meet each other in 10 hours. After meeting, A walks for another 5 hours to reach B. It is known that A is 40 kilometers faster than B per hour. Find the distance between the two places ．
甲、乙两人同时从A、B两地相向匀速前进，10小时候相遇，相遇后甲又走了5小时到达B地，已知甲每小时比乙快40千米，求两地间的距离．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

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

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 / (1/2)</gadget>
<output>80</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">80 * 15</gadget>
<output>1_200</output>

<result>1_200</result>