Find the Area of the Shaded Region in the Figure $0.081 \mathrm {~m} ^ { 2 }$

Multiple Choice

Find the area of the shaded region in the figure. Round results to the nearest unit. Use π≈ 3.14.
- $0.081 \mathrm {~m} ^ { 2 }$ to square centimeters

A) $8.1 \mathrm {~cm} ^ { 2 }$
B) $810 \mathrm {~cm} ^ { 2 }$
C) $8100 \mathrm {~cm} ^ { 2 }$
D) $81 \mathrm {~cm} ^ { 2 }$