program HitungLuasLingkaran;
var
jariJari, luas: real;
const
PI = 3.14;
f = 2;
begin
writeln('--- Program Hitung Luas Lingkaran ---');
readln(jariJari);
luas := PI * jariJari * 2;
writeln('Luas lingkaran adalah: ', luas:0:2);
readln;
end.
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