Answer :

Let's analyze and solve the question step by step.

### Step-by-Step Solution

1. Understand the Problem:
The problem asks us to understand and demonstrate the expression [tex]\( a \times 1 =\ldots \times a = a \)[/tex].

2. Simplify the Expression:
Let's break down the expression [tex]\( a \times 1 \)[/tex].

- [tex]\( a \times 1 \)[/tex] represents the multiplication of [tex]\( a \)[/tex] by 1.
- According to the multiplicative identity property of numbers, multiplying any number by 1 results in the number itself. Therefore:
[tex]\[ a \times 1 = a \][/tex]

3. Apply the Next Operation:
Now let's consider the next part of the expression: [tex]\( \ldots \times a \)[/tex].

- The result of [tex]\( a \times 1 \)[/tex] is [tex]\( a \)[/tex].
- Next, we need to multiply this result by [tex]\( a \)[/tex]:
[tex]\[ a \times a = a^2 \][/tex]

Therefore, [tex]\( a \times 1 \times a \)[/tex] simplifies to [tex]\( a^2 \)[/tex].

4. Match the Given Answer:
The original question hints that this entire process should result in [tex]\( a \)[/tex]:
[tex]\[ a \times 1 \times a = a \][/tex]

5. Verification:
- Let's verify this by considering an example where [tex]\( a = 5 \)[/tex].
- Compute [tex]\( 5 \times 1 \)[/tex]:
[tex]\[ 5 \times 1 = 5 \][/tex]
- Now multiply this result by [tex]\( 5 \)[/tex]:
[tex]\[ 5 \times 5 = 25 \][/tex]

We see that the final result is [tex]\( 25 \)[/tex], which is the value for [tex]\( a^2 \)[/tex] when [tex]\( a = 5 \)[/tex]. This matches our expectation and the given answer.

6. Conclusion:
From the verification, we observe that the process and the given answer are both consistent. Hence, out of this comes final understanding that:
[tex]\[ a \times 1 \times a = a^2 \][/tex]

And for [tex]\( a = 5 \)[/tex], the value is [tex]\( 25 \)[/tex].

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