Xiao Gang reads a science and technology book. He reads (1/5) of the whole book on the first day and 60% of the whole book on the second day, leaving 24 pages unread. How many pages does this science and technology book have?
小刚看一本科技书，第一天看了全书的(1/5)，第二天看了全书的60%，还剩24页没有看，这本科技书共有多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (1/5) - (3/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">24 / (1/5)</gadget>
<output>120</output>

<result>120</result>