Alright, let's work through 1213 times 31 step by step
1213 × 31 = 31 × (1213)
+ 31 × 3 that results in 93
+ 31 × 10 which equals 310
+ 31 × 200 giving us 6200
+ 31 × 1000 that results in 31000

= 37603
