A truck can transport ore 16 times a day on a sunny day, but only 11 times a day on a rainy day. It has been transported for 17 consecutive days, and it has been transported 222 times in total. How many days did it rain in these days?
一辆卡车运矿石，晴天每天可运16次，雨天每天只能运11次，它一连运了17天，共运了222次，问这些天中有多少天下雨？
<gadget id="calculator">16 * 17</gadget>
<output>272</output>

<gadget id="calculator">272 - 222</gadget>
<output>50</output>

<gadget id="calculator">16 - 11</gadget>
<output>5</output>

<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<result>10</result>