Lin Lin reads a 120-page story book, read this book on the first day (3/10), and read this book on the second day (2/5). What page should Lin Lin start to read on the third day?
林林看一本120页的故事书，第一天看了这本书的(3/10)，第二天看了这本书的(2/5)．林林第三天应从第几页开始看起？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/10) + (2/5)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">120 * (7/10)</gadget>
<output>84</output>

<gadget id="calculator">84 + 1</gadget>
<output>85</output>

<result>85</result>