Two cars, A and B, start from east and west at the same time. Car A travels 56 kilometers per hour. After 3 o'clock, car B meets A at (3/7) of the whole journey. How many kilometers is the distance between East and West?
甲、乙两辆汽车同时从东、西两地相对开出，甲车每时行56千米，乙车开出3时后，在全程的(3/7)处与甲车相遇．东、西两地相距多少千米？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / (4/7)</gadget>
<output>21/4 = around 5.25</output>

<gadget id="calculator">56 * (21/4)</gadget>
<output>294</output>

<result>294</result>