The distance between A and B is 258 kilometers. A car and a tractor drive out from two places at the same time, and the two cars meet after 4 hours. It is known that the speed of the car is twice the speed of the tractor. When they met, how many kilometers farther did the car travel than the tractor?
甲乙两地相距258千米．一辆汽车和一辆拖拉机同时分别从两地相对开出，经过4小时两车相遇．已知汽车的速度是拖拉机速度的2倍．相遇时，汽车比拖拉机多行多少千米．
<gadget id="calculator">258 / 4</gadget>
<output>129/2 = around 64.5</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">(129/2) / 3</gadget>
<output>43/2 = around 21.5</output>

<gadget id="calculator">(43/2) * 4</gadget>
<output>86</output>

<result>86</result>