supermarket is promoting eggs, stipulating that each customer buys no more than 3 kilograms at 12.8 yuan per kilogram, and the excess is 10.7 yuan per kilogram. Aunt Wang bought eggs for 76.92 yuan. How many kilograms of eggs did Aunt Wang buy?
某超市在搞鸡蛋促销，规定每位顾客买不超过3千克的，每千克12.8元，超过的部分每千克10.7元．王阿姨买了76.92元鸡蛋．王阿姨买了多少千克鸡蛋？
<gadget id="calculator">12.8 * 3</gadget>
<output>38.4</output>

<gadget id="calculator">76.92 - 38.4</gadget>
<output>38.52</output>

<gadget id="calculator">38.52 / 10.7</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 + 3</gadget>
<output>6.6</output>

<result>6.6</result>