Meixin Cake Shop specially made a birthday cake, 5 cakes can be made with 1.6kg of flour. Master Li received 4 kilograms of flour, how many birthday cakes like this can he make at most?
美心蛋糕房特制一种生日蛋糕，用1.6千克面粉可以做了5个．李师傅领了4千克面粉，最多可以做几个这样的生日蛋糕？
<result>12</result>