No problem, we've got 63999392 and 26075842 to multiply
63999392 × 26075842 = 26075842 × (63999392)
+ 26075842 × 2 giving us 52151684
+ 26075842 × 90 which equals 2346825780
+ 26075842 × 300 what gives us 7822752600
+ 26075842 × 9000 yielding 234682578000
+ 26075842 × 90000 giving us 2346825780000
+ 26075842 × 900000 yielding 23468257800000
+ 26075842 × 3000000 that results in 78227526000000
+ 26075842 × 60000000 that results in 1564550520000000

= 1668838033888064
