uses crt;
var i,j,s:integer;
z:real;
begin
clrscr;
s:=8;
for i:=1 to 10 do
s:=s+4;
for j:=1 to 15 do
z:=z+1/s;
writeln('Otvet: ',z);
readln
end.
uses crt;
var i,j,s:integer;
z:real;
begin
clrscr;
s:=8;
for i:=1 to 10 do
s:=s+4;
for j:=1 to 15 do
z:=z+1/s;
writeln('Otvet: ',z);
readln
end.