passenger car is driving from A to B, and a truck is driving from B to A at the same time. The truck passes the midpoint of 28 kilometers and meets the bus. It is known that the speed ratio of the bus and the truck is 5:7. How many kilometers will the truck have to go to reach the first place?
一辆客车从甲地开往乙地，同时一辆货车从乙地开往甲地，货车驶过中点28千米与客车相遇，已知客车与货车的速度之比为5：7，相遇后货车还要行多少千米到达甲地？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(1/2) - (5/12)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">28 / (1/12)</gadget>
<output>336</output>

<gadget id="calculator">336 * (5/12)</gadget>
<output>140</output>

<result>140</result>