code: func gfDivide(a, b gfElement) gfElement {
  	if a == gfZero {
  		return gfZero
  	} else if b == gfZero {
  		log.Panicln("Divide by zero")
  	}
  
  	return gfMultiply(a, gfInverse(b))
  }
docs: // gfDivide returns a / b.
  //
  // Divide by zero results in a panic.