10 trunks
100 branches
1000 twigs
10000 leaves
10 trunks -1= 9 trunks
1 trunk = 10 branches
100 branches -10 90 branches
100 branch = 1000 twigs
1000 twigs - 100 = 900 twigs
1000 twigs = 10000 leaves
10000 leaves - 1000 = 9000
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90 branches -1 = 89 branches
900 twigs -10 = 890 twigs
9000 leaves -100 = 8900 leaves
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890 twigs -1 = 889 twigs
8900 leaves -10 =8890 leaves
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8890 leaves -1 =8889 leaves
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A: 8889 leaves