Lingling read a long fairy tale. I read 11 pages on the first day. Read 14 pages the next day. After that, read 3 more pages every day than the previous day. In this way, the first 10 days just finished reading. How many pages does this long fairy tale have?
玲玲读一部长篇童话．第一天读了11页．第二天读了14页．以后每天都比前一天多读3页．这样第10天正好读完．这部长篇童话一共有多少页？
<gadget id="calculator">11 * 10</gadget>
<output>110</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">10 * 9 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 / 2</gadget>
<output>135</output>

<gadget id="calculator">110 + 135</gadget>
<output>245</output>

<result>245</result>