Xiaoxiao has some books, which are distributed to 5 people, 6 people, and 7 people respectively, and there are 4 books left. How many books are there at least?
笑笑有一些书，分别平均分给5人、6人、7人后，都剩下4本，这些书至少有多少本．
<gadget id="calculator">5 * 6 * 7</gadget>
<output>210</output>

<gadget id="calculator">210 + 4</gadget>
<output>214</output>

<result>214</result>