program task;
var a,b:integer;
begin
write('a=');
readln(a);
write('b=');
readln(b);
writeln;
writeln(a,'+',b,'=',a+b);
writeln(a,'-',b,'=',a-b);
writeln(a,'*',b,'=',a*b);
write(a,'/',b,'=');
if b<>0 then
writeln(a/b)
else
writeln('division by zero');
readln;
end.