54456571 ÷ 809 
We want to divide 54456571 by 809.

Going ahead to step 1:
The number 809 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 809

Let's proceed to step 2:
When dividing 54 by 809, we get 0 with a remainder of 54.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Bring next digit (4) of the dividend behind the 54 and repeat the process: 544 / 809

Going ahead to step 3:
If we divide 544 by 809, we get 0 and a remainder of 544.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 544 leaves us with 544.
Append the next digit (5) from the dividend to 544 and continue with: 5445 / 809

Let's proceed to step 4:
The number 809 fits into 5445 6 times, leaving a remainder of 591.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 4854 from 5445 leaves us with 591.
Include the next digit (6) from the dividend after 591, then repeat: 5916 / 809

On to step 5:
When dividing 5916 by 809, we get 7 with a remainder of 253.
Put 7 as the next digit of the answer. 
Result so far: 67.0
Subtracting 5663 from 5916 leaves us with 253.
Grab the next digit (5) from the dividend, add it to 253, then carry on: 2535 / 809

Step 6:
When dividing 2535 by 809, we get 3 with a remainder of 108.
Record the quotient 3 as the next digit in the result. 
Result so far: 673.0
Deduct 2427 from 2535 and we're left with 108.
Append the next digit (7) from the dividend to 108 and continue with: 1087 / 809

Moving on to step 7:
If we divide 1087 by 809, we get 1 and a remainder of 278.
Record the quotient 1 as the next digit in the result. 
Result so far: 6731.0
Deduct 809 from 1087 and we're left with 278.
Include the next digit (1) from the dividend after 278, then repeat: 2781 / 809

Step 8:
When dividing 2781 by 809, we get 3 with a remainder of 354.
Use 3 as the next digit of our solution. 
Result so far: 67313.0
Deduct 2427 from 2781 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

On to step 9:
809 can be fit into 3540 4 times, resulting in a remainder of 304.
Write down 4 as next digit of the result. 
Result so far: 67313.4
If we take 3236 away from 3540, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Going ahead to step 10:
809 goes into 3040 3 times with a remainder of 613.
Write down 3 as next digit of the result. 
Result so far: 67313.43
If we subtract 2427 from 3040, we get 613.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6130, and continue the process.

Moving on to step 11:
809 goes into 6130 7 times with a remainder of 467.
Put 7 as the next digit of the answer. 
Result so far: 67313.437
Subtracting 5663 from 6130 leaves us with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Advancing to step 12:
809 can be fit into 4670 5 times, resulting in a remainder of 625.
Use 5 as the next digit of our solution. 
Result so far: 67313.4375
Deduct 4045 from 4670 and we're left with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Moving on to step 13:
When dividing 6250 by 809, we get 7 with a remainder of 587.
Use 7 as the next digit of our solution. 
Result so far: 67313.43757
Deduct 5663 from 6250 and we're left with 587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Moving on to step 14:
When dividing 5870 by 809, we get 7 with a remainder of 207.
The number 7 becomes the next digit in our result. 
Result so far: 67313.437577
Subtracting 5663 from 5870 leaves us with 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

The final result is 67313.437577 with a remainder of 2.07e-05.