A bookstore bought 1000 books, sold 356 books in the first week, and sold 105 more books in the second week than in the first week. Please ask a mathematical problem first, and then answer it.
某图书店进了1000本图书，第一周卖出356本，第二周比第一周多卖出105本．请你先提出一个数学问题，然后再解答．
<gadget id="calculator">356 + 105</gadget>
<output>461</output>

<result>461</result>