Two people, A and B, ride bicycles from two places at the same time towards each other. When they meet, the distance traveled by A is 4 kilometers longer than the whole journey (7/15). It is known that the speed ratio of A and B is 5:4. How many kilometers are the distance between the two places?
甲、乙两人同时从两地骑自行车相向而行，相遇时，甲行的路程比全程的(7/15)多4千米，已知甲、乙两人的速度比是5：4．求两地相距多少千米？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(5/9) - (7/15)</gadget>
<output>4/45 = around 0.088889</output>

<gadget id="calculator">4 / (4/45)</gadget>
<output>45</output>

<result>45</result>