Xiao Ming reads a story book, and reads as many pages on the second day as on the first day, and twice as many pages on the third day as the second day. I just finished reading this 140-page book in three days. How many pages did Xiao Ming read on the first day?
小明看一本故事书，第二天看的与第一天的页数一样多，第三天看的页数是第二天的2倍．三天正好看完这本140页的书．小明第一天看了多少页？
<gadget id="calculator">1 + 1 + 2</gadget>
<output>4</output>

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<result>35</result>