Xiao Ming reads a 120-page story book. He reads 20% on the first day and 40% on the second day. How many pages have he read in two days?
小明看一本120页的故事书，第一天看了20%，第二天看了40%，两天一共看了多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/5) + (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 * (3/5)</gadget>
<output>72</output>

<result>72</result>