Solve the Multiplication Equation: 1 × ? = 27

To solve this problem, let's apply the identity property of multiplication:

• The equation given is $1 \times ? = 27$.
• According to the identity property, multiplying any number by 1 gives the number itself.
• Therefore, the unknown value must be such that $1 \times \text{unknown} = 27$.
• By the property, this implies the unknown is directly equal to 27.

Upon assessing the given options, the correct choice wherein this condition holds true is:

• Choice 3: $27$

This confirms that the solution to the problem is $27$.