The school library counts a batch of books. There are 4 books and 4 local books and 2 books, 5 books and 5 local books and 2 books, 7 books and 7 local books and 2 books. What is the minimum number of these books?
学校图书室清点一批图书，4本4本地数余2本，5本5本地数余2本，7本7本地数还余2本，这些书最少有多少本．
<gadget id="calculator">4 * 5 * 7</gadget>
<output>140</output>

<gadget id="calculator">140 + 2</gadget>
<output>142</output>

<result>142</result>