No problem, we've got 1870 and 7791 to multiply
1870 × 7791 = 7791 × (1870)
+ 7791 × 0 what gives us 0
+ 7791 × 70 resulting in 545370
+ 7791 × 800 resulting in 6232800
+ 7791 × 1000 resulting in 7791000

= 14569170
