Answer :

heyDB
LONG MULTIPLICATION METHOD:

Multiply 7 by 9 to get 63. Place the ones digit (3) in the result line and carry the tens digit (6). There is one result line for each digit in the 17.

Multiply 7 by 0 and add the carried 6 to get 6. Place the result in the next column in the result line. There is one result linefor each digit in 17. There is one result line for each digit in the 17.

Multiply 7 by 8 to get 56. Place the result in the next column in the result line. There is one result line for each digit in 17.There is one result line for each digit in the 17.

Multiply 1 by 9 to get 9. Place the result in the next column in the result line. There is one result line for each digit in 17.There is one result line for each digit in the 17.

Multiply 1 by 0 to get 0. Place the result in the next column in the result line. There is one result line for each digit in 17.There is one result line for each digit in the 17.

Multiply 1 by 8 to get 8. Place the result in the next column in the result line. There is one result line for each digit in 17.There is one result line for each digit in the 17.

Add the numbers in each column. In this case, add 3+0 to
get 
3, then place the 3 in the result line.

Add the numbers in each column. In this case, add 6+9 to get 15, then place the 5 in the result line and carry the 1.

Add the numbers in each column. In this case, add 6+0+1 to get 7, then place the 7 in the result line.

Add the numbers in each column. In this case, add 5+8 to get 13.

The result of 809⋅17 is 13753.
my answer is : 800 x 10 = 8,000 , 9 x 10 = 90 & finally , 800 x 7 = 5600 ,9  x 7 = 63 . So , to conclude ; 13,600 + 153 = 13,753
                                      

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