When Zhang Hua read a book, he read an average of 52 pages a day in the first three days, and the number of pages he read in the fourth day was 12 pages more than the average number of pages in these four days. How many pages did he read in four days?
张华读一本书，前三天平均每天读52页，第四天读的页数比这四天的平均页数多12页，他四天读了多少页．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">52 + 4</gadget>
<output>56</output>

<gadget id="calculator">56 * 4</gadget>
<output>224</output>

<result>224</result>