Alright, let's work through 1978 times 9138 step by step
1978 × 9138 = 9138 × (1978)
+ 9138 × 8 resulting in 73104
+ 9138 × 70 that is equal 639660
+ 9138 × 900 what gives us 8224200
+ 9138 × 1000 that results in 9138000

= 18074964
