Xiao Ming reads a book with a total of 500 pages, and he needs to finish it within a week. He reads 83 pages on Monday, 74 pages on Tuesday, and doesn’t read it on Wednesday. How many pages does Xiao Ming need to read on average every day to finish reading in a week?
小明读一本书，一共500页，要一个星期内读完，星期一读83页，星期二读74页，星期三没有读，请问小明之后平均每天至少要读多少页才能在一个星期内读完？
<gadget id="calculator">500 - 83 - 74</gadget>
<output>343</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">343 / 4</gadget>
<output>343/4 = around 85.75</output>

<result>343/4 = around 85.75</result>