story book has 240 pages. Lele read (1/8) on the first day and the rest (1/7) on the second day. How many pages are left?
一本故事书有240页，乐乐第一天看了(1/8)，第二天看了余下的(1/7)，还剩下多少页？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">240 * (7/8) * (6/7)</gadget>
<output>180</output>

<result>180</result>