//1
var i: byte;
begin
for i := 2 to 20 do
writeln('Цена за ',i,' = ', 20.4 * i);
end.
//2
var i: byte;
Price, TotalPrice: real;
begin
Price := 20.4;
for i := 2 to 20 do
begin
TotalPrice := Price * i;
writeln('Цена за ',i,'шт. = ', TotalPrice);
end;
end.