Alright, let's work through 42850679 times 39215997 step by step
42850679 × 39215997 = 39215997 × (42850679)
+ 39215997 × 9 what gives us 352943973
+ 39215997 × 70 that results in 2745119790
+ 39215997 × 600 what gives us 23529598200
+ 39215997 × 0000 which equals 0
+ 39215997 × 50000 yielding 1960799850000
+ 39215997 × 800000 producing 31372797600000
+ 39215997 × 2000000 that equals 78431994000000
+ 39215997 × 40000000 resulting in 1568639880000000

= 1680432099111963
