Runway 23 means the runway heading is 230 degrees.
47 years in the business. I have a little knowledge about it.
ATC: Endeavor 4819, the winds are 270 at 23 gusting to 33, runway 23 cleared to land.
Winds are reported referencing magnetic north and the magnetic heading for Toronto Runway 23 is 239 degrees. That makes it a 30 degree right crosswind.
Simple trigonometry dictates the 50% of the wind will be crosswind and 86.6% will be headwind. It’s the old sine/cosine trick. I used to do it in my head on a regular basis.
EC