Alright, let's work through 73814407 times 78070777 step by step
73814407 × 78070777 = 78070777 × (73814407)
+ 78070777 × 7 yielding 546495439
+ 78070777 × 00 that equals 0
+ 78070777 × 400 what gives us 31228310800
+ 78070777 × 4000 yielding 312283108000
+ 78070777 × 10000 yielding 780707770000
+ 78070777 × 800000 giving us 62456621600000
+ 78070777 × 3000000 resulting in 234212331000000
+ 78070777 × 70000000 yielding 5464954390000000

= 5762748108284239
