Xiaoyuan goes to the park to play. If she walks 3.6 kilometers per hour, she can get there in 0.8 hours. If she wants to get there in 0.5 hours, how much speed should she increase?
小袁到公园去玩，如果每小时走3.6千米，0.8小时可以到达，如果她想0.5小时到达，速度要提到多少才行？
<gadget id="calculator">0.8 / 0.5</gadget>
<output>1.6</output>

<gadget id="calculator">3.6 * 1.6</gadget>
<output>5.76</output>

<result>5.76</result>