Grade 6 wants to borrow four magazines from the library: "Science Popular", "Youth Literature and Art", "Chinese Children" and "Juvenile Science". At least 2 magazines are required, and a maximum of 4 magazines can be borrowed. How many ways are there in total?
六年级想跟图书室借《科学大众》《少年文艺》《中国儿童》《少年科学》四种杂志，最少需借2种，最多可借4种，请问共有多少种借法．
<gadget id="calculator">6 + 4 + 1</gadget>
<output>11</output>

<result>11</result>