No problem, we've got 40300710 and 31207903 to multiply
40300710 × 31207903 = 31207903 × (40300710)
+ 31207903 × 0 which equals 0
+ 31207903 × 10 resulting in 312079030
+ 31207903 × 700 resulting in 21845532100
+ 31207903 × 0000 producing 0
+ 31207903 × 00000 that results in 0
+ 31207903 × 300000 that equals 9362370900000
+ 31207903 × 0000000 that results in 0
+ 31207903 × 40000000 that is equal 1248316120000000

= 1257700648511130
