Alright, let's work through 2679 times 7639 step by step
2679 × 7639 = 7639 × (2679)
+ 7639 × 9 that is equal 68751
+ 7639 × 70 giving us 534730
+ 7639 × 600 that equals 4583400
+ 7639 × 2000 which equals 15278000

= 20464881
