A car has traveled the whole distance (5/7) from place A to place B, which is 42 kilometers longer than half of the whole journey. How many kilometers has this car traveled?
一辆汽车从甲地开往乙地，已经行了全程的(5/7)，比全程的一半多42千米，这辆车已经行了多少千米？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/7) - (1/2)</gadget>
<output>3/14 = around 0.214286</output>

<gadget id="calculator">42 / (3/14)</gadget>
<output>196</output>

<gadget id="calculator">196 * (5/7)</gadget>
<output>140</output>

<result>140</result>