Alright, let's work through 2545 times 7945 step by step
2545 × 7945 = 7945 × (2545)
+ 7945 × 5 that is equal 39725
+ 7945 × 40 which equals 317800
+ 7945 × 500 giving us 3972500
+ 7945 × 2000 what gives us 15890000

= 20220025
