Alright, let's work through 78046229 times 42073891 step by step
78046229 × 42073891 = 42073891 × (78046229)
+ 42073891 × 9 that is equal 378665019
+ 42073891 × 20 that results in 841477820
+ 42073891 × 200 which equals 8414778200
+ 42073891 × 6000 that equals 252443346000
+ 42073891 × 40000 yielding 1682955640000
+ 42073891 × 000000 which equals 0
+ 42073891 × 8000000 that equals 336591128000000
+ 42073891 × 70000000 that equals 2945172370000000

= 3283708531907039
