The express train and the slow train depart from A and B respectively at the same time. The slow train travels 20% of the whole journey per hour. The express train arrives at the midpoint of A and B two hours earlier (1/10) hour than the slow train, and passes through the midpoint and continues to B is driving, when the slow train reaches the midpoint, the express train is already 9.6 kilometers away from the midpoint, how many kilometers has the express train traveled in total?
快车和慢车分别从甲、乙两地同时相对开出，慢车每小时行全程的20%，快车比慢车早(1/10)小时到达甲、乙两地的中点，并通过中点继续向乙地行驶，当慢车到达中点时，快车已经与中点相距9.6千米，此时快车共行驶了多少千米？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">9.6 / (1/10)</gadget>
<output>96</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5) / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">96 * (5/2)</gadget>
<output>240</output>

<result>240</result>