Greetings from Brasil...
In this problem we can use the potentiation property:
→ Multiplying powers of the same base, maintaining the base and adding the exponents, that is:
Mᵃ · Mᵇ = Mᵃ⁺ᵇ
Applying to the question
3³ · 3² · 3¹ · 3⁰ · 3⁻¹ · 3⁻² = 3⁽³ ⁺ ² ⁺ ¹ ⁺ ⁰ ⁺ ⁽⁻ ¹⁾ ⁺ ⁽⁻ ²⁾⁾ = 3³
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