car can transport ore 16 times a day on sunny days, and only once a day on rainy days. It has been transported for 17 days, and it has been transported 122 times in total. Find out how many days it rains these days.
一辆汽车运矿石，晴天每天可运16次，雨天每天只能运一次，它运了17天，共运了122次．求这些天有多少天下雨．
<gadget id="calculator">16 * 17</gadget>
<output>272</output>

<gadget id="calculator">272 - 122</gadget>
<output>150</output>

<gadget id="calculator">16 - 1</gadget>
<output>15</output>

<gadget id="calculator">150 / 15</gadget>
<output>10</output>

<result>10</result>