From A to B, the express train takes 6 hours to complete the journey, and the slow train takes 8 hours to complete the journey. Now the express train and the slow train start from A and B respectively at the same time and drive in opposite directions. When they meet, the express train travels more than the slow train. What percentage?
从甲地到乙地，快车走完全程要6小时，慢车走完全程要8小时，现在快车和慢车分别从甲、乙两地同时出发，相向行驶，相遇时快车比慢车多行驶了全程的几分之几？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

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

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>