The distance between cities A and B is 330 kilometers. Cars A and B drive from the two cities of A and B, and the speed of A is the speed of B (5/6). After driving a few kilometers from city A, car B You just set off from city B. When the two cars met, car A traveled 30 kilometers longer than car B. How many kilometers did car A drive before car B started?
A、B两城相距330千米，甲乙两车从A、B两城对开，且甲速是乙速的(5/6)，甲车先从A城开出若干千米后，乙车才从B城出发，两车相遇时，甲车一共比乙车多行驶了30千米，甲车出发多少千米时，乙车才出发？
<gadget id="calculator">330 - 30</gadget>
<output>300</output>

<gadget id="calculator">300 / 2</gadget>
<output>150</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">150 * (5/6)</gadget>
<output>125</output>

<gadget id="calculator">30 - 125</gadget>
<output>-95</output>

<gadget id="calculator">150 + (-95)</gadget>
<output>55</output>

<result>55</result>