import numpy as np 

a = np.array( [ [1, 2, 3 ], [4, 5, 6], [7, 8, 9] ] )
b = np.array( [ -1, 0, 1 ] )
c = np.array( [ [3], [6], [9] ] )
d = np.array( [ [1], [2], [3] ] )

print( "a = ", a, sep="\n" )
print( "-"*30 )
print( "a/9 =", a/9, sep="\n" )
print( "-"*30 )

print( "a = ", a, sep="\n" )
print( "-"*30 )
print( "b = ", b, sep="\n" )
print( "-"*30 )
print( "a*b =", a*b, sep="\n" )
print( "-"*30 )