21208442 ÷ 869 
We want to figure out the number of times 21208442 can be divided by 869.

Let's proceed to step 1:
When dividing 2 by 869, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 869

On to step 2:
869 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 869

Going ahead to step 3:
If we divide 212 by 869, we get 0 and a remainder of 212.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Fetch the next digit (0) from the dividend, attach it to 212 and continue: 2120 / 869

Let's proceed to step 4:
869 goes into 2120 2 times with a remainder of 382.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 1738 away from 2120, we end up with 382.
Append the next digit (8) from the dividend to 382 and continue with: 3828 / 869

Let's proceed to step 5:
869 can be fit into 3828 4 times, resulting in a remainder of 352.
Put 4 as the next digit of the answer. 
Result so far: 24.0
The remainder is 352 after subtracting 3476 from 3828.
Fetch the next digit (4) from the dividend, attach it to 352 and continue: 3524 / 869

Step 6:
When dividing 3524 by 869, we get 4 with a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 244.0
The remainder is 48 after subtracting 3476 from 3524.
Append the next digit (4) from the dividend to 48 and continue with: 484 / 869

Going ahead to step 7:
If we divide 484 by 869, we get 0 and a remainder of 484.
Put 0 as the next digit of the answer. 
Result so far: 2440.0
The remainder is 484 after subtracting 0 from 484.
Take the next digit (2) from the dividend and append it to 484, then repeat: 4842 / 869

Let's proceed to step 8:
The number 869 fits into 4842 5 times, leaving a remainder of 497.
Write down 5 as next digit of the result. 
Result so far: 24405.0
Subtract 4345 from 4842 to get 497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4970, and continue the process.

Advancing to step 9:
869 can be fit into 4970 5 times, resulting in a remainder of 625.
Use 5 as the next digit of our solution. 
Result so far: 24405.5
If we take 4345 away from 4970, we end up with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Step 10:
The number 869 fits into 6250 7 times, leaving a remainder of 167.
The next digit of our result is 7. 
Result so far: 24405.57
If we take 6083 away from 6250, we end up with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Step 11:
If we divide 1670 by 869, we get 1 and a remainder of 801.
Use 1 as the next digit of our solution. 
Result so far: 24405.571
If we subtract 869 from 1670, we get 801.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8010, and continue the process.

Let's proceed to step 12:
The number 869 fits into 8010 9 times, leaving a remainder of 189.
Record the quotient 9 as the next digit in the result. 
Result so far: 24405.5719
If we subtract 7821 from 8010, we get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

On to step 13:
869 goes into 1890 2 times with a remainder of 152.
The number 2 becomes the next digit in our result. 
Result so far: 24405.57192
Subtract 1738 from 1890 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 14:
The number 869 fits into 1520 1 times, leaving a remainder of 651.
The next digit of our result is 1. 
Result so far: 24405.571921
The remainder is 651 after subtracting 869 from 1520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Let's proceed to step 15:
869 goes into 6510 7 times with a remainder of 427.
Record the quotient 7 as the next digit in the result. 
Result so far: 24405.5719217
The remainder is 427 after subtracting 6083 from 6510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4270, and continue the process.

Moving on to step 16:
When dividing 4270 by 869, we get 4 with a remainder of 794.
The next digit of our result is 4. 
Result so far: 24405.57192174
Deduct 3476 from 4270 and we're left with 794.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7940, and continue the process.

The final outcome is 24405.57192174, with a leftover of 7.94e-07.