A book has 120 pages in total. Congcong read (1/3) of the whole book on the first day and 30 pages on the second day. What page should he start on the third day?
一本书共120页，聪聪在读书节活动中第一天读了全书的(1/3)，第二天读了30页，第三天应从第几页读起？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">120 * (1/3)</gadget>
<output>40</output>

<gadget id="calculator">40 + 30 + 1</gadget>
<output>71</output>

<result>71</result>