We're dividing 21057085 by 904 
We want to divide 21057085 by 904.

Let's proceed to step 1:
904 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 904

Advancing to step 2:
21 divided by 904 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 904

Going ahead to step 3:
The number 904 fits into 210 0 times, leaving a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Include the next digit (5) from the dividend after 210, then repeat: 2105 / 904

Advancing to step 4:
904 goes into 2105 2 times with a remainder of 297.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 1808 from 2105 and we're left with 297.
Take the next digit (7) from the dividend and append it to 297, then repeat: 2977 / 904

Going ahead to step 5:
904 goes into 2977 3 times with a remainder of 265.
The next digit of our result is 3. 
Result so far: 23.0
The remainder is 265 after subtracting 2712 from 2977.
Take the next digit (0) from the dividend and append it to 265, then repeat: 2650 / 904

Step 6:
If we divide 2650 by 904, we get 2 and a remainder of 842.
Put 2 as the next digit of the answer. 
Result so far: 232.0
Deduct 1808 from 2650 and we're left with 842.
Append the next digit (8) from the dividend to 842 and continue with: 8428 / 904

Moving on to step 7:
If we divide 8428 by 904, we get 9 and a remainder of 292.
Put 9 as the next digit of the answer. 
Result so far: 2329.0
Deduct 8136 from 8428 and we're left with 292.
Bring next digit (5) of the dividend behind the 292 and repeat the process: 2925 / 904

Step 8:
When dividing 2925 by 904, we get 3 with a remainder of 213.
Write down 3 as next digit of the result. 
Result so far: 23293.0
Deduct 2712 from 2925 and we're left with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Let's proceed to step 9:
When dividing 2130 by 904, we get 2 with a remainder of 322.
Use 2 as the next digit of our solution. 
Result so far: 23293.2
Subtract 1808 from 2130 to get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Moving on to step 10:
The number 904 fits into 3220 3 times, leaving a remainder of 508.
Record the quotient 3 as the next digit in the result. 
Result so far: 23293.23
The remainder is 508 after subtracting 2712 from 3220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Moving on to step 11:
When dividing 5080 by 904, we get 5 with a remainder of 560.
The number 5 becomes the next digit in our result. 
Result so far: 23293.235
If we take 4520 away from 5080, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Advancing to step 12:
904 goes into 5600 6 times with a remainder of 176.
Put 6 as the next digit of the answer. 
Result so far: 23293.2356
Subtract 5424 from 5600 to get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Moving on to step 13:
1760 divided by 904 is 1 with a remainder of 856.
The number 1 becomes the next digit in our result. 
Result so far: 23293.23561
If we take 904 away from 1760, we end up with 856.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8560, and continue the process.

Advancing to step 14:
The number 904 fits into 8560 9 times, leaving a remainder of 424.
Use 9 as the next digit of our solution. 
Result so far: 23293.235619
Subtracting 8136 from 8560 leaves us with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Moving on to step 15:
The number 904 fits into 4240 4 times, leaving a remainder of 624.
Record the quotient 4 as the next digit in the result. 
Result so far: 23293.2356194
If we subtract 3616 from 4240, we get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Moving on to step 16:
If we divide 6240 by 904, we get 6 and a remainder of 816.
The number 6 becomes the next digit in our result. 
Result so far: 23293.23561946
Subtracting 5424 from 6240 leaves us with 816.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8160, and continue the process.

Our division results in 23293.23561946 with a remaining 8.16e-07.