No problem, we've got 9813 and 7780 to multiply
9813 × 7780 = 7780 × (9813)
+ 7780 × 3 that equals 23340
+ 7780 × 10 what gives us 77800
+ 7780 × 800 that results in 6224000
+ 7780 × 9000 which equals 70020000

= 76345140
