Alright, let's work through 1901 times 9964 step by step
1901 × 9964 = 9964 × (1901)
+ 9964 × 1 yielding 9964
+ 9964 × 00 which equals 0
+ 9964 × 900 what gives us 8967600
+ 9964 × 1000 yielding 9964000

= 18941564
