Alright, let's work through 9945 times 3977 step by step
9945 × 3977 = 3977 × (9945)
+ 3977 × 5 that is equal 19885
+ 3977 × 40 which equals 159080
+ 3977 × 900 what gives us 3579300
+ 3977 × 9000 that results in 35793000

= 39551265
