L = 1/4 × π × r × r
L = 1/4 × 22/7 × 14 × 14
L = 1/4 × 22 × 2 × 14
L = 1/4 × 44 × 14
L = 11 × 14
L = 154 cm²
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L = 1/4 × π × r × r
L = 1/4 × 22/7 × 14 × 14
L = 1/4 × 22 × 2 × 14
L = 1/4 × 44 × 14
L = 11 × 14
L = 154 cm²