program CT;
uses crt;
var a,b:byte;
dt_hcn,dt_cyl,dt: integer;
const pi=3,14;
begin
writeln('Nhap do dai canh a');
readln(a);
writeln('Nhap do dai canh b');
readln(b);
writeln('Dien tich hinh chu nhat la');
dt_hcn:=a*2*b;
dt_cyl:=(a*a*3,14)/2;
dt:=dt_hcn+dt_cyl;
Writeln('Dien tich cua hinh do la',dt);
readln;
end.