For a book, Xiaohong read 35% of the whole book on the first day, and 45% of the whole book on the second day. If the book has 150 pages, which page should Xiaohong start reading on the third day?
一本书，小红第一天看了全书的35%，第二天看了全书的45%，如果这本书有150页，小红第三天应该从哪一页看起？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(9/20) + (7/20)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">150 * (4/5)</gadget>
<output>120</output>

<gadget id="calculator">120 + 1</gadget>
<output>121</output>

<result>121</result>