Xiao Ming bought the eggs for 5.40 yuan. Later, he felt that the eggs were too small, so he asked the hawker to add 2 eggs for free. In this way, the average price of each egg dropped by 3 cents. How many eggs did Xiao Ming bring back?
小明买鸡蛋花了5.40元，后来他觉得鸡蛋太小，又叫小贩无偿添加了2个鸡蛋．这样一来，平均每个鸡蛋价格降了3分钱，小明共带回多少个鸡蛋？
<result>20</result>