No problem, we've got 90390687 and 68903420 to multiply
90390687 × 68903420 = 68903420 × (90390687)
+ 68903420 × 7 what gives us 482323940
+ 68903420 × 80 producing 5512273600
+ 68903420 × 600 resulting in 41342052000
+ 68903420 × 0000 that equals 0
+ 68903420 × 90000 that is equal 6201307800000
+ 68903420 × 300000 resulting in 20671026000000
+ 68903420 × 0000000 which equals 0
+ 68903420 × 90000000 that results in 6201307800000000

= 6228227470449540
