No problem, we've got 81497359 and 20864484 to multiply
81497359 × 20864484 = 20864484 × (81497359)
+ 20864484 × 9 which equals 187780356
+ 20864484 × 50 that is equal 1043224200
+ 20864484 × 300 what gives us 6259345200
+ 20864484 × 7000 resulting in 146051388000
+ 20864484 × 90000 that is equal 1877803560000
+ 20864484 × 400000 that equals 8345793600000
+ 20864484 × 1000000 what gives us 20864484000000
+ 20864484 × 80000000 that results in 1669158720000000

= 1700400342897756
