Maths Crossword

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Across
  1. 3. 39x207
  2. 5. 49x49x49
  3. 10. 32x65
  4. 11. 27x27x52
  5. 12. the product of 278 and 96
  6. 14. -8x-3x-9+71
  7. 17. -103x-17
  8. 18. 10x377
  9. 20. -4x-57
Down
  1. 1. 13924 divided by 118
  2. 2. 69x69
  3. 4. the product of 500 and 64
  4. 6. the product of 2271 and 64
  5. 7. 79x81
  6. 8. 11071x82
  7. 9. 99x102
  8. 13. 5789 divided by 7
  9. 15. 668641 divided by 571
  10. 16. 17x17x17+89
  11. 19. -8+6-87