No problem, we've got 18640628 and 72009644 to multiply
18640628 × 72009644 = 72009644 × (18640628)
+ 72009644 × 8 resulting in 576077152
+ 72009644 × 20 producing 1440192880
+ 72009644 × 600 yielding 43205786400
+ 72009644 × 0000 that equals 0
+ 72009644 × 40000 resulting in 2880385760000
+ 72009644 × 600000 yielding 43205786400000
+ 72009644 × 8000000 which equals 576077152000000
+ 72009644 × 10000000 which equals 720096440000000

= 1342304986216432
