No problem, we've got 81265584 and 41385821 to multiply
81265584 × 41385821 = 41385821 × (81265584)
+ 41385821 × 4 giving us 165543284
+ 41385821 × 80 that results in 3310865680
+ 41385821 × 500 that equals 20692910500
+ 41385821 × 5000 producing 206929105000
+ 41385821 × 60000 which equals 2483149260000
+ 41385821 × 200000 which equals 8277164200000
+ 41385821 × 1000000 producing 41385821000000
+ 41385821 × 80000000 producing 3310865680000000

= 3363242912884464
