How do you do AREA some pls help and explain

Answer:
52[tex]u^{2}[/tex]
Step-by-step explanation:
What we know:
total rectangle area = yellow area + red
length of total (yellow + red) rectangle: 11 units
width of total (yellow + red) rectangle: 6 units
length of red rectangle: 7 units
width of red rectangle 2 units
formula for area of rectangle: l x w
solve:
area of yellow only = total area - red rectangle
A = l x w (of total) - l x w (of red)
A = (11 x 66) - (7 x 2)
A = 66 - 14
A = 52
ans. the area of the yellow shaded region is 52[tex]u^{2}[/tex]