Alright, let's work through 1210 times 3515 step by step
1210 × 3515 = 3515 × (1210)
+ 3515 × 0 producing 0
+ 3515 × 10 resulting in 35150
+ 3515 × 200 that results in 703000
+ 3515 × 1000 that results in 3515000

= 4253150
