Alright, let's work through 1386 times 158 step by step
1386 × 158 = 158 × (1386)
+ 158 × 6 giving us 948
+ 158 × 80 yielding 12640
+ 158 × 300 what gives us 47400
+ 158 × 1000 giving us 158000

= 218988
