Alright, let's work through 87813023 times 19928380 step by step
87813023 × 19928380 = 19928380 × (87813023)
+ 19928380 × 3 that is equal 59785140
+ 19928380 × 20 yielding 398567600
+ 19928380 × 000 resulting in 0
+ 19928380 × 3000 what gives us 59785140000
+ 19928380 × 10000 that results in 199283800000
+ 19928380 × 800000 producing 15942704000000
+ 19928380 × 7000000 yielding 139498660000000
+ 19928380 × 80000000 giving us 1594270400000000

= 1749971291292740
