Alright, let's work through 80385249 times 4621808 step by step
80385249 × 4621808 = 4621808 × (80385249)
+ 4621808 × 9 that equals 41596272
+ 4621808 × 40 which equals 184872320
+ 4621808 × 200 that equals 924361600
+ 4621808 × 5000 what gives us 23109040000
+ 4621808 × 80000 which equals 369744640000
+ 4621808 × 300000 that results in 1386542400000
+ 4621808 × 0000000 giving us 0
+ 4621808 × 80000000 that equals 369744640000000

= 371525186910192
