No problem, we've got 40200712 and 39905627 to multiply
40200712 × 39905627 = 39905627 × (40200712)
+ 39905627 × 2 that results in 79811254
+ 39905627 × 10 yielding 399056270
+ 39905627 × 700 that results in 27933938900
+ 39905627 × 0000 what gives us 0
+ 39905627 × 00000 which equals 0
+ 39905627 × 200000 what gives us 7981125400000
+ 39905627 × 0000000 giving us 0
+ 39905627 × 40000000 that equals 1596225080000000

= 1604234618206424
