T Vector
   Float x, y

   F (x, y)
      .x = x
      .y = y

   F +(vector)
      R Vector(.x + vector.x, .y + vector.y)

   F -(vector)
      R Vector(.x - vector.x, .y - vector.y)

   F *(mult)
      R Vector(.x * mult, .y * mult)

   F /(denom)
      R Vector(.x / denom, .y / denom)

   F String()
      R ‘(#., #.)’.format(.x, .y)

print(Vector(5, 7) + Vector(2, 3))
print(Vector(5, 7) - Vector(2, 3))
print(Vector(5, 7) * 11)
print(Vector(5, 7) / 2)