It takes 3 hours for car A to travel from point A to point B, and it takes 4 hours for car B to complete the trip. The two cars leave from AB at the same time. When they meet, car A travels 48 kilometers longer than car B. How many kilometers is the whole journey?
从A地到B地甲车要3小时行完，乙车要4小时行完，两车同时从AB两地相对开出，相遇时甲车比乙车多行48千米．全程多少千米？
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">48 / 1</gadget>
<output>48</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">48 * 7</gadget>
<output>336</output>

<result>336</result>