No problem, we've got 28373393 and 13250365 to multiply
28373393 × 13250365 = 13250365 × (28373393)
+ 13250365 × 3 which equals 39751095
+ 13250365 × 90 yielding 1192532850
+ 13250365 × 300 what gives us 3975109500
+ 13250365 × 3000 giving us 39751095000
+ 13250365 × 70000 giving us 927525550000
+ 13250365 × 300000 that results in 3975109500000
+ 13250365 × 8000000 resulting in 106002920000000
+ 13250365 × 20000000 that is equal 265007300000000

= 375957813538445
