We're going to solve 90213802 multiplied by 78082321
90213802 × 78082321 = 78082321 × (90213802)
+ 78082321 × 2 yielding 156164642
+ 78082321 × 00 that equals 0
+ 78082321 × 800 giving us 62465856800
+ 78082321 × 3000 that results in 234246963000
+ 78082321 × 10000 giving us 780823210000
+ 78082321 × 200000 that equals 15616464200000
+ 78082321 × 0000000 what gives us 0
+ 78082321 × 90000000 that equals 7027408890000000

= 7044103046394442
