Xiao Liang reads a "Story Book". He read 20% of the whole book on the first day, and 1/3 of the whole book on the second day. He read a total of 64 pages in these two days. How many pages did he read on the first day?
小亮看一本《故事书》，第一天看了全书的20%，第二天看了全书的(1/3)，这两天共看了64页，第一天看了多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) + (1/3)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">64 / (8/15)</gadget>
<output>120</output>

<gadget id="calculator">120 * (1/5)</gadget>
<output>24</output>

<result>24</result>