program mult_long;


{$APPTYPE CONSOLE}

var a,b,c:array[0..1000] of integer;
i:integer;
f:text;
ch:char;
des:integer;
begin
{assign(f,'long.dat');
reset(f);
for i:=0 to 1000 do a[i]:=0;
while not(eoln(f)) do begin
read(f,ch);
if ch in ['0'..'9'] then begin
for i:=a[0] downto 1 do a[i+1]:=a[i];
a[0]:=a[0]+1;
a[1]:=ord(ch)-ord('0');
end;
end;
for i:=0 to 1000 do b[i]:=0;
while not(eof(f)) do begin
read(f,ch);
if ch in ['0'..'9'] then begin
for i:=b[0] downto 1 do b[i+1]:=b[i];
b[0]:=b[0]+1;
b[1]:=ord(ch)-ord('0');
end;
end;
close (f); }
for i:=1 to 5 do a[i]:=1;
b[1]:=2;

c[0]:=a[0];
des:=0;
for i:=1 to c[0] do begin
c[i]:=(a[i]*b[1]+des) mod 10;
des:=(a[i]*b[1]+des) div 10
end;

while des>0 do begin c[0]:=c[0]+1;c[c[0]]:=des mod 10; des:=des div 10;end;

assign(f,'long.sol');
rewrite(f);
for i:=c[0] downto 1 do write(f,c[i]);
close(f);
end.