There are ten years in a decade.
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Ten decades equals 100 years or one century.
620 years. 620 years, since one century equals 100 years, and one decade equals 10 years.
One hundred
There are 10 years in one decade. Therefore, 164 years is equal to 164 / 10 = 16.4 decades.
well..100 centuries OR 10 decades equals to one century..