Solutions 
The door to the clubhouse has an area of 1792² centimeters. The length of the door is 56 centimeters. To solve the problem we need to know how to find area. 
A door is in a shape of a rectangle. To calculate area of a rectangle you need to do -- 
L x w = area 
L (56) x n = 1792 
1792 ÷ 56 = n 
n = 32 
Check your work 
L x w = area 
(56) x (32) = 1792 
We are correct. 
The width of the door is 32 centimeters.