There are 3 different books, 6 students come to borrow, all of them are borrowed, and each person borrows at most 1 book, how many different borrowing methods are there?
有3本不同的书，有6名同学来借，全部借出去，每人最多借1本，共有多少种不同的借法？
<gadget id="calculator">6 * 5 * 4</gadget>
<output>120</output>

<result>120</result>