The distance between A and B is 19.6 kilometers. Xiaoming’s walking speed is 4.9 kilometers per hour. Both Xiaoming and Xiaohua start from A to B. If Xiaohua walks 3.2 kilometers first and Xiaoming starts again, then Xiaoming and Xiaohua Hua arrives at B at the same time. What is Xiao Hua's walking speed?
甲乙两地相距19.6千米，小明的步行速度是4.9千米/小时，小明和小华都从甲地出发去乙地，如果小华先走3.2千米，小明再开始出发，那么小明和小华同时到达乙地．问小华的步行速度是多少？
<gadget id="calculator">19.6 - 3.2</gadget>
<output>16.4</output>

<gadget id="calculator">19.6 / 4.9</gadget>
<output>4</output>

<gadget id="calculator">16.4 / 4</gadget>
<output>4.1</output>

<result>4.1</result>