To apply the Product Rule of Exponents, we use the rule that states:
\[ a^m \cdot a^n = a^{m+n} \]
In your case, we have the expression:
\[ 1^6 \cdot 1^2 \cdot 1^1 \]
Since the base is the same (which is 1), we can add the exponents:
\[ 1^{6+2+1} = 1^{9} \]
Thus, the equivalent expression of \( 1^6 \cdot 1^2 \cdot 1^1 \) is:
\[ 1^9 \]
And since any power of 1 is still 1, we can also say:
\[ 1^{9} = 1 \]
So, the final result is:
\[ 1 \]