We look at the division of 21801088 by 331 
Let's see how many times 331 fits into 21801088.

Step 1:
The number 331 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 331

Going ahead to step 2:
331 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (8) from the dividend to 21 and continue with: 218 / 331

Step 3:
The number 331 fits into 218 0 times, leaving a remainder of 218.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 218 and we're left with 218.
Append the next digit (0) from the dividend to 218 and continue with: 2180 / 331

Step 4:
331 goes into 2180 6 times with a remainder of 194.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 1986 away from 2180, we end up with 194.
Append the next digit (1) from the dividend to 194 and continue with: 1941 / 331

Let's proceed to step 5:
The number 331 fits into 1941 5 times, leaving a remainder of 286.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
If we subtract 1655 from 1941, we get 286.
Take the next digit (0) from the dividend and append it to 286, then repeat: 2860 / 331

Going ahead to step 6:
331 goes into 2860 8 times with a remainder of 212.
Use 8 as the next digit of our solution. 
Result so far: 658.0
Subtracting 2648 from 2860 leaves us with 212.
Grab the next digit (8) from the dividend, add it to 212, then carry on: 2128 / 331

Moving on to step 7:
331 goes into 2128 6 times with a remainder of 142.
The next digit of our result is 6. 
Result so far: 6586.0
Subtracting 1986 from 2128 leaves us with 142.
Take the next digit (8) from the dividend and append it to 142, then repeat: 1428 / 331

Step 8:
331 goes into 1428 4 times with a remainder of 104.
Record the quotient 4 as the next digit in the result. 
Result so far: 65864.0
Subtracting 1324 from 1428 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 9:
1040 divided by 331 is 3 with a remainder of 47.
The next digit of our result is 3. 
Result so far: 65864.3
Deduct 993 from 1040 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 10:
The number 331 fits into 470 1 times, leaving a remainder of 139.
The next digit of our result is 1. 
Result so far: 65864.31
If we take 331 away from 470, we end up with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 11:
The number 331 fits into 1390 4 times, leaving a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 65864.314
If we subtract 1324 from 1390, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 12:
If we divide 660 by 331, we get 1 and a remainder of 329.
Write down 1 as next digit of the result. 
Result so far: 65864.3141
Subtracting 331 from 660 leaves us with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Let's proceed to step 13:
331 goes into 3290 9 times with a remainder of 311.
Put 9 as the next digit of the answer. 
Result so far: 65864.31419
Subtract 2979 from 3290 to get 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Moving on to step 14:
When dividing 3110 by 331, we get 9 with a remainder of 131.
Use 9 as the next digit of our solution. 
Result so far: 65864.314199
Deduct 2979 from 3110 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

The final outcome is 65864.314199, with a leftover of 1.31e-05.