Zhang Wei read a 180-page extra-curricular book during the summer vacation. He read the whole book in the first week (2/9), and read less in the second week than in the first week (3/10). What page should I start reading in the third week?
张伟暑假看一本180页的课外书，第一周看了全书的(2/9)，第二周比第一周少看了(3/10)．第三周该从第几页开始看？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">180 * (2/9)</gadget>
<output>40</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">180 * (2/9) * (7/10)</gadget>
<output>28</output>

<gadget id="calculator">40 + 28 + 1</gadget>
<output>69</output>

<result>69</result>