var a,b,cor:array[1..50] of real;
    s:real;
    f,g:text;
    i,j,n:longint;
begin
assign(f,'aliens.in'); reset(f);
assign(g,'aliens.out'); rewrite(g);
readln(f,n);
for i := 1 to n do begin
          readln(f,a[i],b[i]);
          cor[i]:=a[i]/b[i];
                   end;
                   s:=1;
for i := 1 to n do
          if cor[i]>0 then s:=s*cor[i];
writeln(g,s:0:0);
close(f);
close(g);
end.