When Xiao Liang reads a book, when he has read (3/4) of the pages of the whole book, he has read exactly 78 pages. How many pages does this book have?
小亮读一本书，当读了全书页数的(3/4)时，正好读了78页．这本书一共有多少页？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">78 / (3/4)</gadget>
<output>104</output>

<result>104</result>