No problem, we've got 4171 and 2780 to multiply
4171 × 2780 = 2780 × (4171)
+ 2780 × 1 that results in 2780
+ 2780 × 70 what gives us 194600
+ 2780 × 100 that is equal 278000
+ 2780 × 4000 that results in 11120000

= 11595380
