Alright, let's work through 3570 times 639 step by step
3570 × 639 = 639 × (3570)
+ 639 × 0 resulting in 0
+ 639 × 70 what gives us 44730
+ 639 × 500 that is equal 319500
+ 639 × 3000 which equals 1917000

= 2281230
