Xiaohong has a technical book with 120 pages in total. She reads 1/5 of the whole book on the first day and 30% of the whole book on the second day. How many pages are left?
小红有本科技书共120页，第一天看了全书的(1/5)，第二天看了全书的30%，还剩多少页没看？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/5) - (3/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">120 * (1/2)</gadget>
<output>60</output>

<result>60</result>