program Project5;
{$APPTYPE CONSOLE}
label 1,2;
var F,N:integer;H:real;
begin
1:writeln('Vvedit skilki tryvae odna seriya');
readln(F);
if f<=0 then begin
writeln(F,' hvylyn ne isnue');
goto 1;end else
2:writeln('Vvedit kilkist seriy');
readln(N);
if N<=0 then begin
writeln(N,' seriy ne isnue');
goto 2;end else
H:=F/60*N;
writeln(H:4:3);
readln;
end.