I am trying to make a simple calculator, unfortunately, it isn't going so well.

Any ideas on how to make it simple?

```
if gamemode=1 then {If gamemode 1 has been chosen}
begin
clrscr;
title;
writeln ('Welcome to Calculator');
writeln;
writeln ('To begin, press <Enter>');
readln;
clrscr;
title;
writeln ('Choose which symbol is needed');
writeln ('"+" "-" "*" "/"');
readln(symbol);
if symbol='+' then {addition}
begin
clrscr;
title;
writeln ('Addition Problem (One time use only)');
writeln;
writeln ('Enter two numbers(with spaces) to solve out.(No decimal numbers)');
readln (add1,add2);
addresult:=add1+add2;
writeln;
writeln ('The result is ',addresult);
readln;
clrscr;
title;
quit;
end;
if symbol='-' then {subtraction}
begin
clrscr;
title;
writeln ('Subtraction Problem (One time use only)');
writeln;
writeln ('Enter two numbers(with spaces) to solve out.(No decimal numbers)');
readln (sub1,sub2);
subresult:=sub1-sub2;
writeln;
writeln ('The result is ',subresult);
readln;
clrscr;
title;
quit;
end;
if symbol='*' then {multiplication}
begin
clrscr;
title;
writeln ('Multiplication Problem (One time use only)');
writeln;
writeln ('Enter two numbers(space after one number) to solve out.(No decimal numbers or symbols)');
readln (mult1,mult2);
multresult:=mult1*mult2;
writeln;
writeln ('The result is ',multresult);
readln;
clrscr;
title;
quit;
end;
if symbol='/' then {division}
begin
clrscr;
title;
writeln ('Division Problem (One time use only)');
writeln;
writeln ('Enter two numbers(with spaces) to solve out.(No decimal numbers)');
readln (div1,div2);
if div2<=0 then
begin
clrscr;
title;
writeln ('Syntax Error, Denominator can not be less than 0');
quit;
end;
divresult:=div1 div div2;
writeln;
writeln ('The result is ',divresult:1:5);
readln;
clrscr;
title;
quit;
end;
end
```