Someone plans to finish reading a 385-page book in 7 days, and read 40 pages on the first day. It is known that starting from the second day, each day reads the same number of pages more than the previous day. How many pages do you read each day?
某人计划在7天里读完一本有385页的书，第一天读了40页．已知从第二天起，每一天都比前一天多读同样的页数．问每天多读多少页？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">385 * (2/7)</gadget>
<output>110</output>

<gadget id="calculator">110 - 40</gadget>
<output>70</output>

<gadget id="calculator">70 - 40</gadget>
<output>30</output>

<gadget id="calculator">30 / 6</gadget>
<output>5</output>

<result>5</result>