In other words,
if A = [aij]m × n, B = [bjk]n × p, then the ith row of A is [ai1 ai2 ain] and the kth column of
B is 
1 2 k
k
nk
b
b
b














 , then cik =  ai1 b1k + ai2 b2k + ai3 b3k +