An old woman made a living by selling eggs. She sells 30 eggs and 30 duck eggs every day. Three eggs are sold for 1 yuan, and duck eggs are sold for 1 yuan. In this way, she can sell 25 yuan a day. Suddenly one day, a passer-by told her to mix eggs and duck eggs and sell them for 2 yuan for 5 eggs, which could sell faster. The next day, the old lady tried to do this, and she got a few yuan.
一位老婆婆靠卖蛋营生．她每天卖鸡蛋、鸭蛋各30个，其中鸡蛋每3个卖1元钱，鸭蛋每2个卖1元钱，这样一天可以卖得25元钱．忽然有一天，有一位路人告诉她把鸡蛋和鸭蛋混在一起每5个卖2元，可以卖得快一些．第二天，老婆婆就尝试着这样做，结果得到了多少元．
<gadget id="calculator">30 + 30</gadget>
<output>60</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>