No problem, we've got 16421493 and 68471308 to multiply
16421493 × 68471308 = 68471308 × (16421493)
+ 68471308 × 3 giving us 205413924
+ 68471308 × 90 which equals 6162417720
+ 68471308 × 400 giving us 27388523200
+ 68471308 × 1000 what gives us 68471308000
+ 68471308 × 20000 what gives us 1369426160000
+ 68471308 × 400000 that is equal 27388523200000
+ 68471308 × 6000000 resulting in 410827848000000
+ 68471308 × 10000000 that results in 684713080000000

= 1124401105022844
