Mother squirrel picks pine cones, 18 per day on sunny days and 10 per day on rainy days. It picked 112 pine cones for several consecutive days, with an average of 14 per day. How many days did it rain?
松鼠妈妈采松果，晴天每天可采18个，雨天每天可采10个．它连续几天采了112个松果，平均每天采14个，这些天中有几天下雨？
<gadget id="calculator">112 / 14</gadget>
<output>8</output>

<gadget id="calculator">18 * 8</gadget>
<output>144</output>

<gadget id="calculator">144 - 112</gadget>
<output>32</output>

<gadget id="calculator">18 - 10</gadget>
<output>8</output>

<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<result>4</result>