1. You have square brackets in line 1 and line 40. Delete those.
2. Delete space between '*' and ')' when closing comments in lines 19, 22, 27, 28 and 31.
3. In line 26 you start if-then-else branch. There are several issues here. If there is more than one statement you need to enclose it in begin/end block. In line 28 you don't have an expression to assign to 'NS:='. In line 32 you miss semicolon in the end of line.
4. In line 36 you also miss semicolon in the end of line.
Now your program should compile, but it probably won't work as you hope.
E.g. you use NumC variable and you didn't initialize it (or calculate it).
In several places you read variables GS and NS from keyboard (ReadLn). I assume you should calculate those variables.
In one comment you have multiplying with decimal number (0.25). If you will use decimal numbers in your calculations you should use 'real' instead of 'integer' when declaring those variables.
Probably more problems will surface, but try to fix these for now.