We divide 21001091 by 312
We want to divide 21001091 by 312.

Advancing to step 1:
2 divided by 312 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 312

Going ahead to step 2:
If we divide 21 by 312, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 312

Let's proceed to step 3:
The number 312 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
The remainder is 210 after subtracting 0 from 210.
Append the next digit (0) from the dividend to 210 and continue with: 2100 / 312

Going ahead to step 4:
312 can be fit into 2100 6 times, resulting in a remainder of 228.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 1872 from 2100 leaves us with 228.
Fetch the next digit (1) from the dividend, attach it to 228 and continue: 2281 / 312

Moving on to step 5:
312 goes into 2281 7 times with a remainder of 97.
Use 7 as the next digit of our solution. 
Result so far: 67.0
Subtracting 2184 from 2281 leaves us with 97.
Append the next digit (0) from the dividend to 97 and continue with: 970 / 312

Going ahead to step 6:
970 divided by 312 is 3 with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 673.0
Subtracting 936 from 970 leaves us with 34.
Include the next digit (9) from the dividend after 34, then repeat: 349 / 312

On to step 7:
312 can be fit into 349 1 times, resulting in a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 6731.0
If we take 312 away from 349, we end up with 37.
Bring next digit (1) of the dividend behind the 37 and repeat the process: 371 / 312

Going ahead to step 8:
The number 312 fits into 371 1 times, leaving a remainder of 59.
Put 1 as the next digit of the answer. 
Result so far: 67311.0
Subtracting 312 from 371 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 9:
590 divided by 312 is 1 with a remainder of 278.
Write down 1 as next digit of the result. 
Result so far: 67311.1
Subtract 312 from 590 to get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Advancing to step 10:
The number 312 fits into 2780 8 times, leaving a remainder of 284.
The number 8 becomes the next digit in our result. 
Result so far: 67311.18
The remainder is 284 after subtracting 2496 from 2780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Moving on to step 11:
When dividing 2840 by 312, we get 9 with a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 67311.189
If we subtract 2808 from 2840, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 12:
320 divided by 312 is 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 67311.1891
Deduct 312 from 320 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
When dividing 80 by 312, we get 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 67311.1891
Subtracting 0 from 80 leaves us 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.

On to step 14:
312 can be fit into 800 2 times, resulting in a remainder of 176.
Put 2 as the next digit of the answer. 
Result so far: 67311.189102
The remainder is 176 after subtracting 624 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Let's proceed to step 15:
1760 divided by 312 is 5 with a remainder of 200.
Record the quotient 5 as the next digit in the result. 
Result so far: 67311.1891025
Subtracting 1560 from 1760 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 16:
312 goes into 2000 6 times with a remainder of 128.
Put 6 as the next digit of the answer. 
Result so far: 67311.18910256
If we subtract 1872 from 2000, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The quotient of the division is 67311.18910256, and the remainder is 1.28e-07.