A story book has 140 pages. Xiaohong read the whole book (1/7) on the first day, and the rest (1/6) on the second day. How many pages did she read on the second day?
一本故事书有140页，小红第一天读了全书的(1/7)，第二天读了余下的(1/6)，第二天读了几页？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">140 * (1/7)</gadget>
<output>20</output>

<gadget id="calculator">140 - 20</gadget>
<output>120</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 * (1/6)</gadget>
<output>20</output>

<result>20</result>