No problem, we've got 84920926 and 90830421 to multiply
84920926 × 90830421 = 90830421 × (84920926)
+ 90830421 × 6 which equals 544982526
+ 90830421 × 20 what gives us 1816608420
+ 90830421 × 900 that results in 81747378900
+ 90830421 × 0000 resulting in 0
+ 90830421 × 20000 what gives us 1816608420000
+ 90830421 × 900000 what gives us 81747378900000
+ 90830421 × 4000000 that results in 363321684000000
+ 90830421 × 80000000 giving us 7266433680000000

= 7713403460289846
