Alright, let's work through 18816042 times 20379602 step by step
18816042 × 20379602 = 20379602 × (18816042)
+ 20379602 × 2 producing 40759204
+ 20379602 × 40 what gives us 815184080
+ 20379602 × 000 that equals 0
+ 20379602 × 6000 which equals 122277612000
+ 20379602 × 10000 which equals 203796020000
+ 20379602 × 800000 that equals 16303681600000
+ 20379602 × 8000000 that equals 163036816000000
+ 20379602 × 10000000 giving us 203796020000000

= 383463447175284
