The school organized military training in the summer camp. The original plan was to walk 11.25 kilometers in 3 hours, but the actual distance was 2.5 hours. How many kilometers per hour did you actually walk more than originally planned?
学校夏令营组织军事训练，原计划3小时走11.25千米，实际2.5小时走完全程．实际比原计划每小时多走多少千米？
<gadget id="calculator">11.25 / 2.5</gadget>
<output>4.5</output>

<gadget id="calculator">11.25 / 3</gadget>
<output>3.75</output>

<gadget id="calculator">4.5 - 3.75</gadget>
<output>0.75</output>

<result>0.75</result>