Alright, let's work through 3130 times 9921 step by step
3130 × 9921 = 9921 × (3130)
+ 9921 × 0 that results in 0
+ 9921 × 30 what gives us 297630
+ 9921 × 100 resulting in 992100
+ 9921 × 3000 that results in 29763000

= 31052730
