Xiao Ming reads a book, reads 35 pages on the first day, reads 20% more on the second day than the first day, and reads 50% less on the third day than the second day, how many pages does Xiao Ming read on the third day?
小明看一本书，第一天看了35页，第二天比第一天多看20%，第三天比第二天少看50%，小明第三天看书多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</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">35 * (6/5) * (1/2)</gadget>
<output>21</output>

<result>21</result>