The number of people in class 5 and 3 is between 50-60. During the general cleaning, (1/4) students clean the dry area, and (1/7) students clean the classroom. How many people are there in Class 5 and 3?
五3班的人数在50-60之间．在进行大扫除的时候，(1/4)的同学打扫包干区，(1/7)的同学打扫教室．五3班共有多少人．
<result>56</result>