No problem, we've got 3815 and 5302 to multiply
3815 × 5302 = 5302 × (3815)
+ 5302 × 5 that is equal 26510
+ 5302 × 10 that is equal 53020
+ 5302 × 800 what gives us 4241600
+ 5302 × 3000 that results in 15906000

= 20227130
