Answer :

To solve the given problem step-by-step, follow these instructions:

1. Identify the numbers involved:
We are given three numbers: 3.12, 21, and 5.12.

2. Compute the product of the first two numbers:
We first multiply 3.12 by 21.

[tex]\[ 3.12 \times 21 = 65.52 \][/tex]

3. Divide the result by the third number:
Next, we take the product from the first step and divide it by 5.12.

[tex]\[ \frac{65.52}{5.12} = 12.796875 \][/tex]

4. Present the final result:
So, the result of the calculation is:

[tex]\[ 3.12 \times 21 = 65.52 \][/tex]

And,

[tex]\[ \frac{65.52}{5.12} = 12.796875 \][/tex]

Thus, the computed values are:

- The product of 3.12 and 21 is [tex]\( 65.52 \)[/tex]
- The result of dividing 65.52 by 5.12 is [tex]\( 12.796875 \)[/tex]