Xiao Ming reads a 120-page story book. He reads the whole book (3/10) on the first day and the whole book (3/20) on the second day. How many pages are left?
小明看一本120页的故事书，第一天看了全书的(3/10)，第二天看了全书的(3/20)，还有多少页没看？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/10) - (3/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">120 * (11/20)</gadget>
<output>66</output>

<result>66</result>