Alright, let's work through 1431 times 155 step by step
1431 × 155 = 155 × (1431)
+ 155 × 1 what gives us 155
+ 155 × 30 that results in 4650
+ 155 × 400 that results in 62000
+ 155 × 1000 what gives us 155000

= 221805
