For a 180-page book, Xiaohua reads 30 pages on the first day, and the rest (1/3) on the second day. From which page should I read it on the third day?
一本180页的书，小华第一天看30页，第二天看了剩下的(1/3)，第三天该从第几页看起呢？
<gadget id="calculator">180 - 30</gadget>
<output>150</output>

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

<gadget id="calculator">150 * (1/3)</gadget>
<output>50</output>

<gadget id="calculator">30 + 50</gadget>
<output>80</output>

<gadget id="calculator">80 + 1</gadget>
<output>81</output>

<result>81</result>