combination of two matrcies

Hello, how can i write a combination of matrcies as follows L=[ai_j] of order 4,M of order 4, then S=[4*ai_j+M] of order 4. i mean each element in S is a matrex of order 4

Answer 1

[Matt J]

S=log(kron(exp(4*L), exp(M)))

[Zinab]

Thank you. Your answer is so helpful