Mama Wang's family originally had 30 eggs, and they also raised a hen that could lay one egg a day. Mama Wang's family had to eat 2 chickens a day. These eggs were enough for Mama Wang's family to eat for how many days in a row.
王妈妈家原有30个鸡蛋，还养了一只一天能下一个蛋的母鸡，王妈妈家一天要吃2个鸡，这些鸡蛋够王妈妈家连续吃多少天．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">30 / 1</gadget>
<output>30</output>

<result>30</result>