Abacus Ancient Chinese calculator

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Across
  1. 3. Path of Sikhism
  2. 5. My School
  3. 8. legendary Shark
Down
  1. 1. Boris Pasternak Hero
  2. 2. 3 legged stool
  3. 4. Author of Frankenstein
  4. 6. Brand of locks & Cupboards
  5. 7. when something is divided by Zero