There are 11 people forming a circle, and they are numbered 1 to 11 in turn, and the book "Fun Mathematics" is distributed sequentially from the 1st. Send 1 book every 1 person, 1 book every 2 people; send 1 book every 1 person, and 1 book every 2 people.... If the distribution continues like this, how many books must be prepared at least to make the same number of copies distributed to everyone?
有11个人围成一个圆圈，并依次编成1～11号，从1号起依次发《趣味数学》书，发书的方法是：隔1人发1本，隔2人发1本；再隔1人发1本，隔2人发1本；再隔1人发1本，隔2人发1本…．这样发下去，试问最少要准备多少本书才能使发给每人的本数同样多？
<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<result>22</result>