Xiao Fang reads a story book, reads (1/3) of the whole book on the first day, and reads 10 pages on the second day. At this time, the ratio of the number of pages read to the number of pages not read is 2:3. From which page should I start on the third day?
小方看一本故事书，第一天看了全书的(1/3)，第二天又看了10页，这时看了的页数与未看的页数的比是2：3，第三天应从第几页看起？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

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

<gadget id="calculator">(2/5) - (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">10 / (1/15)</gadget>
<output>150</output>

<gadget id="calculator">150 * (2/5)</gadget>
<output>60</output>

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

<result>61</result>