Alright, let's work through 77401109 times 17948870 step by step
77401109 × 17948870 = 17948870 × (77401109)
+ 17948870 × 9 that results in 161539830
+ 17948870 × 00 that is equal 0
+ 17948870 × 100 that results in 1794887000
+ 17948870 × 1000 that results in 17948870000
+ 17948870 × 00000 giving us 0
+ 17948870 × 400000 that results in 7179548000000
+ 17948870 × 7000000 which equals 125642090000000
+ 17948870 × 70000000 yielding 1256420900000000

= 1389262443296830
