I am a first year student in University and I've been stuck on this question in one of my post-lab reports.

Calculate RT in kJ/mol when T = 869C

R= 8.3145 J mol^(-1)K^(-1) ( these are exponents to (-1))

.. now I know it's a simple sub in and multiply question. But I don't know how to convert K into kJ? And do I just sub 869 into T even though it's in Celsius?