Alright, let's work through 81623478 times 18747380 step by step
81623478 × 18747380 = 18747380 × (81623478)
+ 18747380 × 8 that is equal 149979040
+ 18747380 × 70 resulting in 1312316600
+ 18747380 × 400 resulting in 7498952000
+ 18747380 × 3000 giving us 56242140000
+ 18747380 × 20000 yielding 374947600000
+ 18747380 × 600000 that results in 11248428000000
+ 18747380 × 1000000 that equals 18747380000000
+ 18747380 × 80000000 which equals 1499790400000000

= 1530226358987640
