Xiao Liu read a book, and the number of pages he did not read was 3.8 times the number of pages he read. The number of pages he did not read was 84 more than the number of pages he read. How many pages does this book have?
小刘看了一本书，他没看的页数是看了页数的3.8倍，没看的页数比看了的页数多84页，这本书共有多少页？
<gadget id="calculator">3.8 - 1</gadget>
<output>2.8</output>

<gadget id="calculator">84 / 2.8</gadget>
<output>30</output>

<gadget id="calculator">30 + 84</gadget>
<output>114</output>

<gadget id="calculator">30 + 114</gadget>
<output>144</output>

<result>144</result>