Xiaoqiang read a science and technology book, read 30 pages on the first day, 25 pages on the second day, and just read the whole book in two days (5/11). How many pages does this technical book have?
小强看一本科技书，第一天看了30页，第二天看了25页，两天正好看了全书的(5/11)．这本科技书有多少页？
<gadget id="calculator">30 + 25</gadget>
<output>55</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">55 / (5/11)</gadget>
<output>121</output>

<result>121</result>