Alright, let's work through 63679245 times 78687054 step by step
63679245 × 78687054 = 78687054 × (63679245)
+ 78687054 × 5 what gives us 393435270
+ 78687054 × 40 that equals 3147482160
+ 78687054 × 200 resulting in 15737410800
+ 78687054 × 9000 that results in 708183486000
+ 78687054 × 70000 that results in 5508093780000
+ 78687054 × 600000 resulting in 47212232400000
+ 78687054 × 3000000 producing 236061162000000
+ 78687054 × 60000000 that is equal 4721223240000000

= 5010732189994230
