Xiaoying has been reading a fairy tale book for 4 days, with an average of 28 pages per day. There are 20 pages left to read. How many pages does this book have?
小英看一本童话书，已经看了4天，平均每天看28页．还剩20页没看．这本书一共有多少页？
<gadget id="calculator">28 * 4</gadget>
<output>112</output>

<gadget id="calculator">112 + 20</gadget>
<output>132</output>

<result>132</result>