Rotating by the same amount

So I am trying to rotate an object by 60 degrees around a point. But no matter what value I type to rotate it, It always rotates by 280. How can I get it to rotate by a specific angle around a point?

Vector3 v31 = new Vector3 (0, 0, 0);
Vector3 v32 = new Vector3 (0, 0, //value I want to rotate);
tf.RotateAround(v31, v32, 1000);

Well you rotate your object by 1000 degree. That are two full rotations and 280° (Since 360+360+280 == 1000). If you want to rotate by 60° you might want to pass 60 instead of 1000 ^^.

The second parameter just defines an axis you want to rotate around. How much you rotate is defined in the 3. parameter.

Have you read the documentation?