Two cars are traveling toward each other from AB at the same time, and meet at a distance of 45 kilometers from the midpoint of the two places. After meeting, they continue to drive forward. When one car reaches the destination, the other car is still far away from the destination. For the whole journey (1/5), how many kilometers is the distance between AB and AB?
两辆车分别从AB两地同时相向而行，在离两地中点45千米处相遇，相遇后继续向前行驶，当一辆车到达目的地时，另一辆车离目的地还有全程的(1/5)，AB两地相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/2) - (4/9)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">45 / (1/18)</gadget>
<output>810</output>

<result>810</result>