Alright, let's work through 1560 times 7803 step by step
1560 × 7803 = 7803 × (1560)
+ 7803 × 0 that equals 0
+ 7803 × 60 that is equal 468180
+ 7803 × 500 resulting in 3901500
+ 7803 × 1000 resulting in 7803000

= 12172680
