Alright, let's work through 1559 times 138 step by step
1559 × 138 = 138 × (1559)
+ 138 × 9 producing 1242
+ 138 × 50 yielding 6900
+ 138 × 500 that results in 69000
+ 138 × 1000 what gives us 138000

= 215142
