Alright, let's work through 20181301 times 79763001 step by step
20181301 × 79763001 = 79763001 × (20181301)
+ 79763001 × 1 producing 79763001
+ 79763001 × 00 that equals 0
+ 79763001 × 300 yielding 23928900300
+ 79763001 × 1000 that equals 79763001000
+ 79763001 × 80000 that equals 6381040080000
+ 79763001 × 100000 yielding 7976300100000
+ 79763001 × 0000000 that is equal 0
+ 79763001 × 20000000 what gives us 1595260020000000

= 1609721131844301
