No problem, we've got 5872844 and 80439943 to multiply
5872844 × 80439943 = 80439943 × (5872844)
+ 80439943 × 4 what gives us 321759772
+ 80439943 × 40 which equals 3217597720
+ 80439943 × 800 producing 64351954400
+ 80439943 × 2000 that equals 160879886000
+ 80439943 × 70000 yielding 5630796010000
+ 80439943 × 800000 yielding 64351954400000
+ 80439943 × 5000000 resulting in 402199715000000

= 472411236607892
