The distance between A and B is 280 kilometers. There is a gas station on the way that is the same distance from the two places. On a certain day, two cars A and B are driving towards each other at the same time. It is known that the speed of A is the speed of B (3/ 4) How far are the two cars from the gas station when they meet on the way?
A、B两地相距280千米，途中有一个加油站距两地的距离相同，某日甲、乙两车同时从两地相向而行，已知甲车速度是乙车速度的(3/4)，两车在途中相遇时距加油站有多远？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">280 * (1/14)</gadget>
<output>20</output>

<result>20</result>