No problem, we've got 9781 and 7860 to multiply
9781 × 7860 = 7860 × (9781)
+ 7860 × 1 that is equal 7860
+ 7860 × 80 giving us 628800
+ 7860 × 700 resulting in 5502000
+ 7860 × 9000 what gives us 70740000

= 76878660
