No problem, we've got 90173450 and 72091493 to multiply
90173450 × 72091493 = 72091493 × (90173450)
+ 72091493 × 0 yielding 0
+ 72091493 × 50 that results in 3604574650
+ 72091493 × 400 resulting in 28836597200
+ 72091493 × 3000 what gives us 216274479000
+ 72091493 × 70000 that results in 5046404510000
+ 72091493 × 100000 what gives us 7209149300000
+ 72091493 × 0000000 that results in 0
+ 72091493 × 90000000 that equals 6488234370000000

= 6500738639460850
