Alright, let's work through 2291 times 7870 step by step
2291 × 7870 = 7870 × (2291)
+ 7870 × 1 that results in 7870
+ 7870 × 90 which equals 708300
+ 7870 × 200 resulting in 1574000
+ 7870 × 2000 what gives us 15740000

= 18030170
