No problem, we've got 9933994 and 15721825 to multiply
9933994 × 15721825 = 15721825 × (9933994)
+ 15721825 × 4 what gives us 62887300
+ 15721825 × 90 resulting in 1414964250
+ 15721825 × 900 producing 14149642500
+ 15721825 × 3000 producing 47165475000
+ 15721825 × 30000 that equals 471654750000
+ 15721825 × 900000 giving us 14149642500000
+ 15721825 × 9000000 resulting in 141496425000000

= 156180515219050
