The railway from the county seat to the provincial capital is 595 kilometers long. It used to take 7 hours for a train to travel from the county seat to the provincial capital, but after the train speeds up, it only takes 5 hours. How many kilometers does the train travel more per hour than before after the speed is increased?
从县城到省城铁路长595千米．一列火车从县城到省城原来需要7小时，火车提速后，只需要5小时．火车提速后每小时比原来多行多少千米？
<gadget id="calculator">595 / 5</gadget>
<output>119</output>

<gadget id="calculator">595 / 7</gadget>
<output>85</output>

<gadget id="calculator">119 - 85</gadget>
<output>34</output>

<result>34</result>