A(m*n) =
a(11)......a(1n)
.
.
a(m1)......a(mn)
--------------------------------------
B(n*p) =
b(11)......b(1p)
.
.
b(n1)......b(np)
--------------------------------------
C(n*p) =
c(11)......c(1p)
.
.
c(n1)......c(np)
--------------------------------------
A*B = C
--------------------------------------
c(11) = a(11)*b(11) + ........+ a(1n)b(n1)
.....
c(1p) = a(11)*b(1p) + ........+ a(1n)b(np)
.....
c(mp) = a(m1)*b(1p) + ........+ a(mn)b(np)