The two passenger and freight vehicles departed from Dongxing and Nanning at the same time, and continued to move forward after the two vehicles met. When the ratio of the distance traveled by the passenger car to the whole journey is 2:3, the truck is still 50% of the whole journey away from Dongxing. At this time, the distance between the two vehicles is 30 kilometers. How many kilometers is the distance from Dongxing to Nanning?
客货两车分别从东兴，南宁同时相对开出，两车相遇后又继续前进．当客车所行路程与全程的比是2：3时，货车离东兴还有全程的50%，这时两车相距30千米，东兴到南宁的路程是多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 / (1/6)</gadget>
<output>180</output>

<result>180</result>