Alright, let's work through 81534944 times 48652895 step by step
81534944 × 48652895 = 48652895 × (81534944)
+ 48652895 × 4 producing 194611580
+ 48652895 × 40 producing 1946115800
+ 48652895 × 900 that is equal 43787605500
+ 48652895 × 4000 yielding 194611580000
+ 48652895 × 30000 that equals 1459586850000
+ 48652895 × 500000 yielding 24326447500000
+ 48652895 × 1000000 yielding 48652895000000
+ 48652895 × 80000000 yielding 3892231600000000

= 3966911069262880
