For a 90-page technical book, the ratio of the number of pages read on the first day to the total number of pages is 2:5, and the number of pages read on the second day is 7/6 of what I read on the first day. How many pages did I read on the second day?
一本90页的科技书，第一天看的页数与总页数的比是2：5，第二天看的是第一天看的六分之七，第二天看了多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">90 * (2/5) * (7/6)</gadget>
<output>42</output>

<result>42</result>