is this true for all k?

k(n on top of r) = (kn on top of kr)

if yes, explain why, if no, isit true for any k?

NB: when i say 'on top of' i mean this kind of 'on top of' Combination - Wikipedia, the free encyclopedia

the big bracket with the floating letters inside with no lines

my first answer was k can be anything but 0, but then because 0! is 1 so my answer now is k can be any number, including neg numbers, what are your thoughts? thanks.