book has a total of 300 pages. Xiaohua read 20% on the first day, which is 1/5 less than the second day. How many pages are left unread after two days?
一本书共300页，小华第一天读了20%，比第二天少读(1/5)，读了两天后还剩下多少页未读？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">300 * (1/5)</gadget>
<output>60</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 / (4/5)</gadget>
<output>75</output>

<gadget id="calculator">300 - 60 - 75</gadget>
<output>165</output>

<result>165</result>