Alright, let's work through 20200667 times 18545329 step by step
20200667 × 18545329 = 18545329 × (20200667)
+ 18545329 × 7 that results in 129817303
+ 18545329 × 60 that is equal 1112719740
+ 18545329 × 600 resulting in 11127197400
+ 18545329 × 0000 producing 0
+ 18545329 × 00000 that results in 0
+ 18545329 × 200000 that results in 3709065800000
+ 18545329 × 0000000 yielding 0
+ 18545329 × 20000000 what gives us 370906580000000

= 374628015534443
