Alright, let's work through 65256398 times 81745413 step by step
65256398 × 81745413 = 81745413 × (65256398)
+ 81745413 × 8 giving us 653963304
+ 81745413 × 90 resulting in 7357087170
+ 81745413 × 300 which equals 24523623900
+ 81745413 × 6000 giving us 490472478000
+ 81745413 × 50000 which equals 4087270650000
+ 81745413 × 200000 which equals 16349082600000
+ 81745413 × 5000000 which equals 408727065000000
+ 81745413 × 60000000 that is equal 4904724780000000

= 5334411205402374
