even the statement inside if statement is false I'm getting the output

#include <stdio.h>
void main()
{
    int a=300,b,c;
    if(a>=400);
    {
      b=300;
      c=200;
      printf("\n%d %d",b,c);
    }
}

The code is written in c language.Even the expression inside the if statement is false I'm getting the output as b=300 and c=200.I'm not pro in coding your response makes me to build new codes thankyou