Program himiya;
Var      :real;

Begin
    readln( );
      := ;
    writeln( );
End.




Program himiya;
Var   a,b,c,x:real;

Begin
    readln(a,b,c);
      x:=a*c/b ;
    writeln(x);
End.


a=31гр;    b=98 гр;    c=233 гр;