book has 150 pages. I read 1/3 of the whole book on the first day, and 30% of the whole book on the second day. How many pages should I start reading on the third day?
一本书150页，第一天看了全书的(1/3)，第二天看了全书的30%，第三天应从第多少页看起．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/3) - (3/10)</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">150 * (11/30)</gadget>
<output>55</output>

<gadget id="calculator">55 + 1</gadget>
<output>56</output>

<result>56</result>