A book has a total of 600 pages. Lili read 30% of the book on the first day, and the remaining 50% on the second day. How many pages are left?
一本书一共600页，丽丽第一天看了全书的30%，第二天看了剩下的50%，还剩下多少页没有看？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">600 * (7/10) * (1/2)</gadget>
<output>210</output>

<result>210</result>