No problem, we've got 4157 and 9621 to multiply
4157 × 9621 = 9621 × (4157)
+ 9621 × 7 that equals 67347
+ 9621 × 50 which equals 481050
+ 9621 × 100 what gives us 962100
+ 9621 × 4000 yielding 38484000

= 39994497
