Which input value produces the same output value x 3 x 2 x 1 x 3?

To find the input value that produces the same output as the expression (3 \times 2 \times 1 \times 3), we first calculate the output. This expression simplifies to (3 \times 2 = 6), then (6 \times 1 = 6), and finally (6 \times 3 = 18). Therefore, the input value that produces the same output value is 18.