No problem, we've got 90394143 and 54712379 to multiply
90394143 × 54712379 = 54712379 × (90394143)
+ 54712379 × 3 that results in 164137137
+ 54712379 × 40 that results in 2188495160
+ 54712379 × 100 what gives us 5471237900
+ 54712379 × 4000 yielding 218849516000
+ 54712379 × 90000 that equals 4924114110000
+ 54712379 × 300000 that results in 16413713700000
+ 54712379 × 0000000 giving us 0
+ 54712379 × 90000000 giving us 4924114110000000

= 4945678611196197
