Two cars depart from A and B respectively at the same time. After driving for 4 hours, the two cars have crossed and the distance is 75 kilometers. , How many kilometers are the distance between the two places B?
两车分别从A、B两地同时相对开出，行驶4小时后，两车已交叉而过并又相距75千米，已知甲乙两车每小时共行驶全程的(7/24)，A、B两地相距多少千米．
<gadget id="calculator">7 / 24</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">(7/24) * 4</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(7/6) - 1</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">75 / (1/6)</gadget>
<output>450</output>

<result>450</result>