Alright, let's work through 7542 times 159 step by step
7542 × 159 = 159 × (7542)
+ 159 × 2 what gives us 318
+ 159 × 40 yielding 6360
+ 159 × 500 producing 79500
+ 159 × 7000 that results in 1113000

= 1199178
