Solve the Operation Sequence: 6 × 3 ÷ 2 × 1 Using PEMDAS

Start by performing the multiplication and division from left to right according to the order of operations.

First, calculate the multiplication: $6 \times 3 = 18$

Next, divide the result by 2: $18 \div 2 = 9$

Finally, multiply by 1: $9 \times 1 = 9$

Thus, the correct answer is $9$.