Let's calculate 40809990 x 99672793
40809990 × 99672793 = 99672793 × (40809990)
+ 99672793 × 0 that is equal 0
+ 99672793 × 90 giving us 8970551370
+ 99672793 × 900 giving us 89705513700
+ 99672793 × 9000 that is equal 897055137000
+ 99672793 × 00000 what gives us 0
+ 99672793 × 800000 yielding 79738234400000
+ 99672793 × 0000000 which equals 0
+ 99672793 × 40000000 producing 3986911720000000

= 4067645685602070
