No problem, we've got 20383541 and 8297038 to multiply
20383541 × 8297038 = 8297038 × (20383541)
+ 8297038 × 1 that is equal 8297038
+ 8297038 × 40 that is equal 331881520
+ 8297038 × 500 that equals 4148519000
+ 8297038 × 3000 producing 24891114000
+ 8297038 × 80000 that is equal 663763040000
+ 8297038 × 300000 yielding 2489111400000
+ 8297038 × 0000000 that results in 0
+ 8297038 × 20000000 what gives us 165940760000000

= 169123014251558
