From place A to place B, it takes 6 hours for car A to complete the journey. The ratio of the speed of car B to the speed of car A is 4:5. Car B travels 50 kilometers per hour. How many kilometers is the whole journey from place A to place B?
从甲地到乙地，甲车行完全程要6小时，乙车速度与甲车速度的比是4：5，乙车每小时行50千米，从甲地到乙地全程多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 / (4/5)</gadget>
<output>125/2 = around 62.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(125/2) / (1/6)</gadget>
<output>375</output>

<result>375</result>