We're dividing 10159451 by 405 
We want to divide 10159451 by 405.

Advancing to step 1:
If we divide 1 by 405, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 405

On to step 2:
If we divide 10 by 405, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 405

Going ahead to step 3:
The number 405 fits into 101 0 times, leaving a remainder of 101.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 101, we end up with 101.
Grab the next digit (5) from the dividend, add it to 101, then carry on: 1015 / 405

Let's proceed to step 4:
1015 divided by 405 is 2 with a remainder of 205.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 205 after subtracting 810 from 1015.
Fetch the next digit (9) from the dividend, attach it to 205 and continue: 2059 / 405

Moving on to step 5:
2059 divided by 405 is 5 with a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we take 2025 away from 2059, we end up with 34.
Bring next digit (4) of the dividend behind the 34 and repeat the process: 344 / 405

On to step 6:
405 can be fit into 344 0 times, resulting in a remainder of 344.
The next digit of our result is 0. 
Result so far: 250.0
Subtract 0 from 344 to get 344.
Bring next digit (5) of the dividend behind the 344 and repeat the process: 3445 / 405

Step 7:
When dividing 3445 by 405, we get 8 with a remainder of 205.
Record the quotient 8 as the next digit in the result. 
Result so far: 2508.0
Deduct 3240 from 3445 and we're left with 205.
Append the next digit (1) from the dividend to 205 and continue with: 2051 / 405

Going ahead to step 8:
When dividing 2051 by 405, we get 5 with a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 25085.0
Subtracting 2025 from 2051 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 9:
The number 405 fits into 260 0 times, leaving a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 25085.0
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 10:
405 can be fit into 2600 6 times, resulting in a remainder of 170.
Use 6 as the next digit of our solution. 
Result so far: 25085.06
Deduct 2430 from 2600 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 11:
If we divide 1700 by 405, we get 4 and a remainder of 80.
The number 4 becomes the next digit in our result. 
Result so far: 25085.064
Deduct 1620 from 1700 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 12:
If we divide 800 by 405, we get 1 and a remainder of 395.
Record the quotient 1 as the next digit in the result. 
Result so far: 25085.0641
If we subtract 405 from 800, we get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 13:
If we divide 3950 by 405, we get 9 and a remainder of 305.
Put 9 as the next digit of the answer. 
Result so far: 25085.06419
Subtracting 3645 from 3950 leaves us with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 14:
3050 divided by 405 is 7 with a remainder of 215.
Write down 7 as next digit of the result. 
Result so far: 25085.064197
If we subtract 2835 from 3050, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Advancing to step 15:
If we divide 2150 by 405, we get 5 and a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 25085.0641975
Subtract 2025 from 2150 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 16:
1250 divided by 405 is 3 with a remainder of 35.
Put 3 as the next digit of the answer. 
Result so far: 25085.06419753
Deduct 1215 from 1250 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The quotient of the division is 25085.06419753, and the remainder is 3.5e-08.