A book has 100 pages in total. Xiao Ming read (2/5) of the whole book on the first day, and the rest (1/3) on the second day. How many pages should he start reading on the third day?
一本书共100页，小明第一天读了全书的(2/5)，第二天读了余下的(1/3)，第三天应从多少页读起．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">60 * (1/3)</gadget>
<output>20</output>

<gadget id="calculator">40 + 20</gadget>
<output>60</output>

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

<result>61</result>