Alright, let's work through 1157 times 576 step by step
1157 × 576 = 576 × (1157)
+ 576 × 7 which equals 4032
+ 576 × 50 that is equal 28800
+ 576 × 100 resulting in 57600
+ 576 × 1000 that results in 576000

= 666432
