No problem, we've got 12215657 and 55655448 to multiply
12215657 × 55655448 = 55655448 × (12215657)
+ 55655448 × 7 which equals 389588136
+ 55655448 × 50 giving us 2782772400
+ 55655448 × 600 that results in 33393268800
+ 55655448 × 5000 what gives us 278277240000
+ 55655448 × 10000 giving us 556554480000
+ 55655448 × 200000 resulting in 11131089600000
+ 55655448 × 2000000 resulting in 111310896000000
+ 55655448 × 10000000 that is equal 556554480000000

= 679867862949336
