From point A to point B, car A takes 8 hours to complete the journey, and car B takes 10 hours to complete the journey. Now two cars A and B are driving toward each other from A and B at the same time. After 4 hours, the distance between the two cars is 48 km. How many kilometers are the distance between A and B?
从A地到B地，甲车行完全程需要8小时，乙车行完全程需要10小时．现甲、乙两车同时从A、B两地相向而行，4小时后两车相距48km，A、B两地相距多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 4</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) + (2/5)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">48 / (1/10)</gadget>
<output>480</output>

<result>480</result>