A and B are walking toward each other from A and B at the same time. When B meets A when B has traveled the full distance (4/9), it is known that B travels 5.5 kilometers per hour, and A travels the entire distance per hour (1/9) , How many kilometers is the distance between A and B?
甲乙两人同时从A、B两地相向而行，当乙走完全程的(4/9)与甲相遇，已知乙每小时行5.5千米，甲每小时行全程的(1/9)，A、B两地相距多少千米？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

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

<gadget id="calculator">(5/9) / (1/9)</gadget>
<output>5</output>

<gadget id="calculator">5.5 / (4/9)</gadget>
<output>12.375</output>

<gadget id="calculator">5 * 12.375</gadget>
<output>61.875</output>

<result>61.875</result>