Wales and Sheep inna Vacuum
Wales is for area, not volume and why bring sheep into it at all? That's just wrong! In proper El Reg units of measure, that's about 2381 KiloJubs and in improper El Reg units of measure, 1149441 Adult Badgers, 11231 Great White Sharks, 6667 Skateboarding Rhinoceri or 222 Austrailian Trams, give or take.
REF: https://www.theregister.co.uk/Design/page/reg-standards-converter.html