Alright, let's work through 2798 times 30 step by step
2798 × 30 = 30 × (2798)
+ 30 × 8 that is equal 240
+ 30 × 90 which equals 2700
+ 30 × 700 which equals 21000
+ 30 × 2000 that is equal 60000

= 83940
