An 80-page story book, if you read (3/5) of this book on the first day, you should start from the number one on the second day.
一本80页的故事书，第一天读了这本书的(3/5)，第二天应从第多少读起．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">80 * (3/5)</gadget>
<output>48</output>

<gadget id="calculator">48 + 1</gadget>
<output>49</output>

<result>49</result>