题目

As we know, most of the material things in our daily life have to be bought with money. But money is not all powerful. Money can't buy many things such as time and true love. There are 24 hours in a day. Sometimes when we are very happy, we wish that the period of happiness would last longer. But no matter what we do, or how much money we are willing to pay, we cannot make a day last longer than 24 hours. On the other hand, when we are unhappy, money cannot make the unhappy time pass away more quickly. True love is another thing which money cannot buy. Suppose we have someone who really loves 正十二边形至少要绕它的中心旋转________度，才能和原来的图形重合．