Uncle Chen worked part-time in other places. On the first day, he received 246 yuan, which was 6 yuan more than the previous day. On the last day, he received 312 yuan. How many days did he do part-time jobs?
陈叔叔在外地打零工，第一天领到的工钱是246元，比前一天多赚6元钱，最后一天他领到了312元，他共打了多少天零工？
<gadget id="calculator">312 - 246</gadget>
<output>66</output>

<gadget id="calculator">66 / 6</gadget>
<output>11</output>

<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<result>12</result>