raio = float(input())
area = 3.14159 * raio ** 2
print('A=%.4f' % area)

b3e4e5db85ac4e186f0f0ffacf8dedcbab3d165a
<mask token>

<mask token>
print('A=%.4f' % area)

raio = float(input())
area = 3.14159 * raio ** 2
print('A=%.4f' % area)
