Alright, let's work through 54930900 times 78020347 step by step
54930900 × 78020347 = 78020347 × (54930900)
+ 78020347 × 0 that is equal 0
+ 78020347 × 00 that is equal 0
+ 78020347 × 900 that is equal 70218312300
+ 78020347 × 0000 which equals 0
+ 78020347 × 30000 producing 2340610410000
+ 78020347 × 900000 giving us 70218312300000
+ 78020347 × 4000000 yielding 312081388000000
+ 78020347 × 50000000 yielding 3901017350000000

= 4285727879022300
