21578239 divided by 978 
Let's see how many times 978 fits into 21578239.

Going ahead to step 1:
When dividing 2 by 978, we get 0 with a remainder of 2.
The next digit of our result is 0. 
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 / 978

Step 2:
978 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 978

Step 3:
978 can be fit into 215 0 times, resulting in a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 215 leaves us with 215.
Include the next digit (7) from the dividend after 215, then repeat: 2157 / 978

Going ahead to step 4:
978 can be fit into 2157 2 times, resulting in a remainder of 201.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 1956 from 2157 to get 201.
Append the next digit (8) from the dividend to 201 and continue with: 2018 / 978

Step 5:
2018 divided by 978 is 2 with a remainder of 62.
The next digit of our result is 2. 
Result so far: 22.0
If we take 1956 away from 2018, we end up with 62.
Grab the next digit (2) from the dividend, add it to 62, then carry on: 622 / 978

Let's proceed to step 6:
The number 978 fits into 622 0 times, leaving a remainder of 622.
Record the quotient 0 as the next digit in the result. 
Result so far: 220.0
Subtract 0 from 622 to get 622.
Bring next digit (3) of the dividend behind the 622 and repeat the process: 6223 / 978

Advancing to step 7:
If we divide 6223 by 978, we get 6 and a remainder of 355.
Record the quotient 6 as the next digit in the result. 
Result so far: 2206.0
The remainder is 355 after subtracting 5868 from 6223.
Append the next digit (9) from the dividend to 355 and continue with: 3559 / 978

Advancing to step 8:
When dividing 3559 by 978, we get 3 with a remainder of 625.
Write down 3 as next digit of the result. 
Result so far: 22063.0
Subtract 2934 from 3559 to get 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Let's proceed to step 9:
The number 978 fits into 6250 6 times, leaving a remainder of 382.
The number 6 becomes the next digit in our result. 
Result so far: 22063.6
The remainder is 382 after subtracting 5868 from 6250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Going ahead to step 10:
978 can be fit into 3820 3 times, resulting in a remainder of 886.
The number 3 becomes the next digit in our result. 
Result so far: 22063.63
Subtracting 2934 from 3820 leaves us with 886.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8860, and continue the process.

Moving on to step 11:
978 goes into 8860 9 times with a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 22063.639
If we subtract 8802 from 8860, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 12:
When dividing 580 by 978, we get 0 with a remainder of 580.
Use 0 as the next digit of our solution. 
Result so far: 22063.639
Deduct 0 from 580 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 13:
978 goes into 5800 5 times with a remainder of 910.
Put 5 as the next digit of the answer. 
Result so far: 22063.63905
If we take 4890 away from 5800, we end up with 910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9100, and continue the process.

On to step 14:
If we divide 9100 by 978, we get 9 and a remainder of 298.
Use 9 as the next digit of our solution. 
Result so far: 22063.639059
Deduct 8802 from 9100 and we're left with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Going ahead to step 15:
978 goes into 2980 3 times with a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 22063.6390593
Deduct 2934 from 2980 and we're left 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.

Moving on to step 16:
978 can be fit into 460 0 times, resulting in a remainder of 460.
Write down 0 as next digit of the result. 
Result so far: 22063.6390593
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.

After the division, we end up with 22063.6390593 and a remainder of 4.6e-07.