No problem, we've got 21178048 and 66135231 to multiply
21178048 × 66135231 = 66135231 × (21178048)
+ 66135231 × 8 giving us 529081848
+ 66135231 × 40 giving us 2645409240
+ 66135231 × 000 that equals 0
+ 66135231 × 8000 that equals 529081848000
+ 66135231 × 70000 resulting in 4629466170000
+ 66135231 × 100000 producing 6613523100000
+ 66135231 × 1000000 giving us 66135231000000
+ 66135231 × 20000000 giving us 1322704620000000

= 1400615096609088
