We're dividing 21015593 by 231 
We want to divide 21015593 by 231.

Going ahead to step 1:
When dividing 2 by 231, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 231

Step 2:
21 divided by 231 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 231

Step 3:
If we divide 210 by 231, we get 0 and a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Include the next digit (1) from the dividend after 210, then repeat: 2101 / 231

Advancing to step 4:
If we divide 2101 by 231, we get 9 and a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 2079 from 2101 and we're left with 22.
Take the next digit (5) from the dividend and append it to 22, then repeat: 225 / 231

Moving on to step 5:
When dividing 225 by 231, we get 0 with a remainder of 225.
Use 0 as the next digit of our solution. 
Result so far: 90.0
Subtract 0 from 225 to get 225.
Include the next digit (5) from the dividend after 225, then repeat: 2255 / 231

Going ahead to step 6:
2255 divided by 231 is 9 with a remainder of 176.
Record the quotient 9 as the next digit in the result. 
Result so far: 909.0
Subtract 2079 from 2255 to get 176.
Fetch the next digit (9) from the dividend, attach it to 176 and continue: 1769 / 231

Advancing to step 7:
When dividing 1769 by 231, we get 7 with a remainder of 152.
Use 7 as the next digit of our solution. 
Result so far: 9097.0
If we take 1617 away from 1769, we end up with 152.
Fetch the next digit (3) from the dividend, attach it to 152 and continue: 1523 / 231

Let's proceed to step 8:
231 can be fit into 1523 6 times, resulting in a remainder of 137.
The number 6 becomes the next digit in our result. 
Result so far: 90976.0
Deduct 1386 from 1523 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Advancing to step 9:
231 goes into 1370 5 times with a remainder of 215.
Write down 5 as next digit of the result. 
Result so far: 90976.5
The remainder is 215 after subtracting 1155 from 1370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Going ahead to step 10:
231 goes into 2150 9 times with a remainder of 71.
Write down 9 as next digit of the result. 
Result so far: 90976.59
The remainder is 71 after subtracting 2079 from 2150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 11:
710 divided by 231 is 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 90976.593
Subtracting 693 from 710 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
If we divide 170 by 231, we get 0 and a remainder of 170.
Write down 0 as next digit of the result. 
Result so far: 90976.593
Subtract 0 from 170 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 13:
The number 231 fits into 1700 7 times, leaving a remainder of 83.
The next digit of our result is 7. 
Result so far: 90976.59307
The remainder is 83 after subtracting 1617 from 1700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 14:
If we divide 830 by 231, we get 3 and a remainder of 137.
Write down 3 as next digit of the result. 
Result so far: 90976.593073
The remainder is 137 after subtracting 693 from 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

On to step 15:
When dividing 1370 by 231, we get 5 with a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 90976.5930735
Deduct 1155 from 1370 and we're left with 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 16:
231 goes into 2150 9 times with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 90976.59307359
If we subtract 2079 from 2150, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

The quotient of the division is 90976.59307359, and the remainder is 7.1e-08.