No problem, we've got 18624464 and 21230149 to multiply
18624464 × 21230149 = 21230149 × (18624464)
+ 21230149 × 4 which equals 84920596
+ 21230149 × 60 resulting in 1273808940
+ 21230149 × 400 which equals 8492059600
+ 21230149 × 4000 yielding 84920596000
+ 21230149 × 20000 that results in 424602980000
+ 21230149 × 600000 giving us 12738089400000
+ 21230149 × 8000000 giving us 169841192000000
+ 21230149 × 10000000 that results in 212301490000000

= 395400145765136
