536729*6384638

3,426,820,369,102

Brief method: 536,729 × 6,384,638 = 6,384,638 × (536,000 + 729) = 6,384,638 × 536,000 + 6,384,638 × 729 = 3,422,165,968,000 + 4,654,401,102 = 3,426,820,369,102