In a book, Xiaohua read 45 pages, and the ones he didn’t read were 8 pages less than the ones he read. How many pages does this book have?
一本书，小华看了45页，没看的比看了的3倍少8页，这本书共有多少页？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">135 - 8</gadget>
<output>127</output>

<gadget id="calculator">127 + 45</gadget>
<output>172</output>

<result>172</result>