Human: matrix multiplication. Assistant: 
Here is a Python function to multiply matrix

import numpy as np

def matrix_multiplication(A, B):
    """
    Matrix multiplication.
    """
    return A @ B

# Enter the matrix
A = np.array([[1, 2], [3, 4]])
B = np.array([[5, 6], [7, 8]])

# Calling the function
print((matrix_multiplication(A, B)))

#Example Output
# [[19 22]
#  [43 50]]

#Remember to inspect code for bugs.