The text provided appears to be a series of multiplication problems, but it includes redundant and potentially erroneous entries. Here's a cleaned-up and formatted version:

[tex]\[
\begin{array}{l}
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
28 \cdot 80 \\
38 \cdot 00 \\
38 \cdot 00 \\
43 \cdot 50 \times 3 = 130 \\
43 \cdot 50 \\
40 \cdot 50 \\
43 \cdot 50 \\
43 \cdot 50 \\
43 \cdot 50 \\
37 \cdot 80 \\
\end{array}
\][/tex]

Please verify if these are the intended calculations or if further corrections are needed.



Answer :

To solve the given sequence of multiplications systematically, follow these steps:

1. First 11 Multiplications:
Each of these multiplications involves multiplying [tex]\(28\)[/tex] by [tex]\(80\)[/tex].
[tex]\[ 28 \cdot 80 = 2240 \][/tex]
Repeated 11 times:
[tex]\[ 28 \cdot 80 = 2240 \][/tex]
So, we get:
[tex]\[ 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240 \][/tex]

2. Next 2 Multiplications:
Each of these multiplications involves multiplying [tex]\(38\)[/tex] by [tex]\(0\)[/tex]. Any number multiplied by [tex]\(0\)[/tex] is [tex]\(0\)[/tex].
[tex]\[ 38 \cdot 0 = 0 \][/tex]
Repeated 2 times:
[tex]\[ 38 \cdot 0 = 0 \][/tex]
So, we get:
[tex]\[ 0, 0 \][/tex]

3. Next Multiplication:
The multiplication [tex]\(43.50 \times 3\)[/tex]:
[tex]\[ 43.50 \times 3 = 130.5 \][/tex]

4. Next 5 Multiplications:
The next value is simply [tex]\(43.50\)[/tex].
[tex]\[ 43.50 \][/tex]
and the following value involves multiplying [tex]\(40.5\)[/tex] by [tex]\(0\)[/tex]. Any number multiplied by [tex]\(0\)[/tex] is [tex]\(0\)[/tex].
[tex]\[ 40.50 \][/tex]
Followed by three more occurrences of [tex]\(43.50\)[/tex]:
[tex]\[ 43.50, 43.50, 43.50 \][/tex]
So, we get:
[tex]\[ 43.5, 40.5, 43.5, 43.5, 43.5 \][/tex]

5. Last Multiplication:
The last multiplication involves multiplying [tex]\(37.8\)[/tex] by [tex]\(1\)[/tex]:
[tex]\[ 37.80 \][/tex]

Putting it all together, the complete sequence of results is:
[tex]\[ 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 2240, 0, 0, 130.5, 43.5, 40.5, 43.5, 43.5, 43.5, 37.8 \][/tex]