Wang Yang read a storybook. On the first day, he read (1/5) of the total number of pages. On the second day, he read 15 pages less than the first day. In two days, he read exactly (1/3) of the total number of pages. How many pages did you read in two days?
汪洋读一本故事书，第一天读了总页数的(1/5)，第二天比第一天少读了15页，两天正好读了总页数的(1/3)．两天一共读了多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(1/5) - (2/15)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">15 / (1/15)</gadget>
<output>225</output>

<gadget id="calculator">225 * (1/3)</gadget>
<output>75</output>

<result>75</result>