If you read 3/5 of the total pages of a book on the first day, and there are 40 pages left, which page should you start reading on the second day?
一本书第一天看了总页数的(3/5)，还剩下40页，第二天从哪一页看起？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 / (2/5)</gadget>
<output>100</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<gadget id="calculator">60 + 1</gadget>
<output>61</output>

<result>61</result>