book has 140 pages, if you read it (3/7) on the first day, how many pages should you start reading on the second day?
一本书有140页，第一天看了它的(3/7)，第二天应从多少页看起．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">140 * (3/7)</gadget>
<output>60</output>

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

<result>61</result>