Introduction to polar coordinates

In the polar plane, there is a point $(3,30\degree)$. Find the polar coordinates of the point which is symmetric to it with respect to the origin. In other words, a line segment drawn between these two points should have the origin as its midpoint.

Enter the radius of the resulting vector as a decimal number with one digit after decimal point, and the angle as a whole positive number of degrees; they should be separated by a single space.

For example, if you think that the answer should be $(1.4142, 45^\circ)$, then enter $1.4\ 45$; if you think that the answer should be $(2, -90^\circ)$, then enter $2.0\ 270$.