We divide 975578 by 21
We want to figure out the number of times 975578 can be divided by 21.

Advancing to step 1:
When dividing 9 by 21, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 21

Going ahead to step 2:
The number 21 fits into 97 4 times, leaving a remainder of 13.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 84 away from 97, we end up with 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 21

On to step 3:
When dividing 135 by 21, we get 6 with a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
If we take 126 away from 135, we end up with 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 21

Advancing to step 4:
If we divide 95 by 21, we get 4 and a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 464.0
If we take 84 away from 95, we end up with 11.
Append the next digit (7) from the dividend to 11 and continue with: 117 / 21

Advancing to step 5:
When dividing 117 by 21, we get 5 with a remainder of 12.
The next digit of our result is 5. 
Result so far: 4645.0
If we subtract 105 from 117, we get 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 21

Advancing to step 6:
21 goes into 128 6 times with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 46456.0
If we take 126 away from 128, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
When dividing 20 by 21, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 46456.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 46456.09
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 46456.095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 46456.0952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
When dividing 80 by 21, we get 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 46456.09523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 12:
21 goes into 170 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 46456.095238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 46456.095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
If we divide 200 by 21, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 46456.09523809
Deduct 189 from 200 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final outcome is 46456.09523809, with a leftover of 1.1e-08.