Huanhuan reads a 156-page storybook. On the first day, he reads 23 pages. On the second day, he reads twice as many pages as on the first day. How many pages should he start reading on the third day?
欢欢看一本156页的故事书，第一天看了23页，第二天看的页数正好是第一天的2倍，他第三天应从第多少页开始看．
<gadget id="calculator">23 * 2</gadget>
<output>46</output>

<gadget id="calculator">23 + 46 + 1</gadget>
<output>70</output>

<result>70</result>