Alright, let's work through 40205120 times 28619047 step by step
40205120 × 28619047 = 28619047 × (40205120)
+ 28619047 × 0 that results in 0
+ 28619047 × 20 which equals 572380940
+ 28619047 × 100 producing 2861904700
+ 28619047 × 5000 that is equal 143095235000
+ 28619047 × 00000 that is equal 0
+ 28619047 × 200000 that results in 5723809400000
+ 28619047 × 0000000 that is equal 0
+ 28619047 × 40000000 which equals 1144761880000000

= 1150632218920640
