The school summer camp organized marching training, originally planned to cover 12.3 kilometers in 3 hours, but actually completed the planned distance in 2.5 hours. How many kilometers did you walk more per hour than originally planned?
学校夏令营组织行军训练，原计划3小时走完12.3千米，实际2.5小时走完原定路程．实际平均每小时比原计划多走多少千米？
<gadget id="calculator">12.3 / 2.5</gadget>
<output>4.92</output>

<gadget id="calculator">12.3 / 3</gadget>
<output>4.1</output>

<gadget id="calculator">4.92 - 4.1</gadget>
<output>0.82</output>

<result>0.82</result>