Cars A and B start from places a and b at the same time, go towards each other, and meet at a distance of 80 kilometers from the midpoint. It is known that the speed ratio of car A and car B is 4:5, find the distance between the two places ．
甲乙两车分别从a，b两地同时出发，相向而行，在距离中点80千米的地方相遇，已知甲车与乙车的速度比是4：5，求两地之间的距离．
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">2 / (1/9)</gadget>
<output>18</output>

<gadget id="calculator">80 * 18</gadget>
<output>1_440</output>

<result>1_440</result>