The area of the whole rectangle:
A=lw
A=(86.3cm)(34.82cm)
[tex]A=3004.966cm^{2} [/tex]
The area of the square:
[tex]A=s^{2} [/tex]
[tex]A=(18.15)^{2} [/tex]
[tex]A=329.4225cm^{2} [/tex]
Subtract the area of the square that was cut from the area of the whole rectangle:
[tex]3004.966cm^{2}-329.4225^{2}=A(remaining)[/tex]
[tex]A=2675.5435cm^{2} [/tex]
