Given the matrix A = [[3, 2], [4, 1]], multiply the matrix by scalar 5.

Step 1 ：Start with the given matrix A = [[3, 2], [4, 1]]

Step 2 ：Multiply each element in the matrix by the scalar. This gives us a new matrix B = [[5*3, 5*2], [5*4, 5*1]]

Step 3 ：Simplify B to get the final result. B = [[15, 10], [20, 5]]