What is (√ 18 - √ 1 / 2) × √ 8? Problem solving process~

What is (√ 18 - √ 1 / 2) × √ 8? Problem solving process~

solution
(√18-√1/2)×√8
=(3√2-√2/2)×2√2
=(3√2×2√2)-(√2/2×2√2)
=12-2
=10