No problem, we've got 4072 and 9931 to multiply
4072 × 9931 = 9931 × (4072)
+ 9931 × 2 what gives us 19862
+ 9931 × 70 which equals 695170
+ 9931 × 000 that results in 0
+ 9931 × 4000 resulting in 39724000

= 40439032
