No problem, we've got 42347979 and 12879985 to multiply
42347979 × 12879985 = 12879985 × (42347979)
+ 12879985 × 9 giving us 115919865
+ 12879985 × 70 that equals 901598950
+ 12879985 × 900 that is equal 11591986500
+ 12879985 × 7000 which equals 90159895000
+ 12879985 × 40000 giving us 515199400000
+ 12879985 × 300000 resulting in 3863995500000
+ 12879985 × 2000000 yielding 25759970000000
+ 12879985 × 40000000 resulting in 515199400000000

= 545441334300315
