We look at the division of 21807739 by 486 
We want to figure out the number of times 21807739 can be divided by 486.

Let's proceed to step 1:
If we divide 2 by 486, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 486

Going ahead to step 2:
If we divide 21 by 486, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 486

Advancing to step 3:
486 goes into 218 0 times with a remainder of 218.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 218, we get 218.
Append the next digit (0) from the dividend to 218 and continue with: 2180 / 486

Advancing to step 4:
2180 divided by 486 is 4 with a remainder of 236.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 236 after subtracting 1944 from 2180.
Append the next digit (7) from the dividend to 236 and continue with: 2367 / 486

Going ahead to step 5:
If we divide 2367 by 486, we get 4 and a remainder of 423.
Put 4 as the next digit of the answer. 
Result so far: 44.0
The remainder is 423 after subtracting 1944 from 2367.
Bring next digit (7) of the dividend behind the 423 and repeat the process: 4237 / 486

Moving on to step 6:
If we divide 4237 by 486, we get 8 and a remainder of 349.
Write down 8 as next digit of the result. 
Result so far: 448.0
Deduct 3888 from 4237 and we're left with 349.
Fetch the next digit (3) from the dividend, attach it to 349 and continue: 3493 / 486

Let's proceed to step 7:
When dividing 3493 by 486, we get 7 with a remainder of 91.
Use 7 as the next digit of our solution. 
Result so far: 4487.0
If we take 3402 away from 3493, we end up with 91.
Bring next digit (9) of the dividend behind the 91 and repeat the process: 919 / 486

Going ahead to step 8:
486 goes into 919 1 times with a remainder of 433.
The next digit of our result is 1. 
Result so far: 44871.0
Subtracting 486 from 919 leaves us with 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

On to step 9:
The number 486 fits into 4330 8 times, leaving a remainder of 442.
Put 8 as the next digit of the answer. 
Result so far: 44871.8
If we subtract 3888 from 4330, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

On to step 10:
The number 486 fits into 4420 9 times, leaving a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 44871.89
Subtracting 4374 from 4420 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 11:
460 divided by 486 is 0 with a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 44871.89
Deduct 0 from 460 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Let's proceed to step 12:
486 goes into 4600 9 times with a remainder of 226.
The next digit of our result is 9. 
Result so far: 44871.8909
Subtract 4374 from 4600 to get 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Moving on to step 13:
2260 divided by 486 is 4 with a remainder of 316.
Record the quotient 4 as the next digit in the result. 
Result so far: 44871.89094
If we take 1944 away from 2260, we end up with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Advancing to step 14:
486 can be fit into 3160 6 times, resulting in a remainder of 244.
Write down 6 as next digit of the result. 
Result so far: 44871.890946
Deduct 2916 from 3160 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 15:
2440 divided by 486 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 44871.8909465
Subtracting 2430 from 2440 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 16:
The number 486 fits into 100 0 times, leaving a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 44871.8909465
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

In conclusion, the division gives 44871.8909465 with a balance of 1e-07.