A little monkey came to a peach grove and ate 12 peaches a day on sunny days, and 8 peaches a day on rainy days. After eating 176 peaches in a row, the little monkey found that he ate 11 peaches a day on average. How many days are rainy days.
一只小猴子来到一片桃林，晴天每天吃掉12个桃子，雨天每天吃掉8个桃子，在连续吃掉176个桃子以后，小猴子发现自己平均每天吃掉了11个桃子，那么这几天中有多少天是雨天．
<gadget id="calculator">192 - 176</gadget>
<output>16</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<result>4</result>