clothing store sold 36 sets of down jackets on the first day, and sold 6 sets less than double the number on the first day on the second day. How many sets were sold on the second day?
某服装店第一天卖出羽绒服36套，第二天卖出的比第一天卖出的2倍少6套，第二天卖出多少套？
<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<gadget id="calculator">72 - 6</gadget>
<output>66</output>

<result>66</result>