matrix_1 = [[0,0], [1,2]]
matrix_2 = [[1, 2], [2,4]]
last_matrix = []

for idx, num in enumerate matrix_1[idx]:
    new_matrix = []
    for idx, num2 in enumerate matrix_2:
        new_matrix.append(matrix_1)
    last_matrix.append(new_matrix)
print(last_matrix)