#TK
program hcn;
uses crt;
var d,r,dt:longint;
cv:real;
begin
write('nhap chieu dai va chieu rong cua hcn:');
readln(d,r);
dt:=d*r;
writeln(' dien tich hcn do la:',dt);
readln
end.
uses crt;
var a,b:integer;
begin
clrscr;
write('Nhap chieu dai:'); readln(a);
write('Nhap chieu rong:'); readln(b);
writeln(a*b);
readln;
end.