Alright, let's work through 7858 times 149 step by step
7858 × 149 = 149 × (7858)
+ 149 × 8 what gives us 1192
+ 149 × 50 yielding 7450
+ 149 × 800 giving us 119200
+ 149 × 7000 which equals 1043000

= 1170842
