Xiao Ming reads a book. He reads (1/3) on the first day, 20 pages on the second day, and there are 16 pages left. How many pages does Xiao Ming read on the first day?
小明同学看一本书，第一天看了(1/3)，第二天看了20页，还剩16页，小明第一天看了多少页？
<gadget id="calculator">20 + 16</gadget>
<output>36</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">36 / (2/3)</gadget>
<output>54</output>

<gadget id="calculator">54 * (1/3)</gadget>
<output>18</output>

<result>18</result>