One less than 5 is 5-1=<<5-1=4>>4.
If one tarantula egg sac can contain 1000 tarantulas, then four egg sacs can hold 4*1000=4000 tarantula babies.
If each tarantula baby has eight legs, the 4 egg sacs can contain 4000*8=<<4000*8=32000>>32,000 baby tarantula legs.
#### 32000