Which equation is correct?

792 × 5 = 700 × 5 + 90 × 5 + 2

792 × 5 = 700 + 90 × 5 + 2 × 5

792 × 5 = 700 × 5 + 90 × 5 + 2 × 5

792 × 5 = 7,000 × 5 + 900 × 5 + 20 × 5