We're dividing 21838601 by 864 
We want to figure out the number of times 21838601 can be divided by 864.

On to step 1:
If we divide 2 by 864, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 864

Going ahead to step 2:
864 can be fit into 21 0 times, resulting in a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 864

Step 3:
864 goes into 218 0 times with a remainder of 218.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 218 and we're left with 218.
Fetch the next digit (3) from the dividend, attach it to 218 and continue: 2183 / 864

Moving on to step 4:
The number 864 fits into 2183 2 times, leaving a remainder of 455.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 1728 from 2183 to get 455.
Append the next digit (8) from the dividend to 455 and continue with: 4558 / 864

Going ahead to step 5:
864 can be fit into 4558 5 times, resulting in a remainder of 238.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
The remainder is 238 after subtracting 4320 from 4558.
Bring next digit (6) of the dividend behind the 238 and repeat the process: 2386 / 864

Step 6:
864 goes into 2386 2 times with a remainder of 658.
Use 2 as the next digit of our solution. 
Result so far: 252.0
If we subtract 1728 from 2386, we get 658.
Take the next digit (0) from the dividend and append it to 658, then repeat: 6580 / 864

Moving on to step 7:
When dividing 6580 by 864, we get 7 with a remainder of 532.
The number 7 becomes the next digit in our result. 
Result so far: 2527.0
Subtract 6048 from 6580 to get 532.
Take the next digit (1) from the dividend and append it to 532, then repeat: 5321 / 864

Moving on to step 8:
If we divide 5321 by 864, we get 6 and a remainder of 137.
Put 6 as the next digit of the answer. 
Result so far: 25276.0
Subtract 5184 from 5321 to get 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 9:
The number 864 fits into 1370 1 times, leaving a remainder of 506.
Put 1 as the next digit of the answer. 
Result so far: 25276.1
If we subtract 864 from 1370, we get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Going ahead to step 10:
The number 864 fits into 5060 5 times, leaving a remainder of 740.
Write down 5 as next digit of the result. 
Result so far: 25276.15
Subtract 4320 from 5060 to get 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

Moving on to step 11:
7400 divided by 864 is 8 with a remainder of 488.
Write down 8 as next digit of the result. 
Result so far: 25276.158
Deduct 6912 from 7400 and we're left with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Going ahead to step 12:
When dividing 4880 by 864, we get 5 with a remainder of 560.
The next digit of our result is 5. 
Result so far: 25276.1585
Deduct 4320 from 4880 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 13:
864 goes into 5600 6 times with a remainder of 416.
Record the quotient 6 as the next digit in the result. 
Result so far: 25276.15856
If we subtract 5184 from 5600, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 14:
The number 864 fits into 4160 4 times, leaving a remainder of 704.
Record the quotient 4 as the next digit in the result. 
Result so far: 25276.158564
Deduct 3456 from 4160 and we're left with 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Advancing to step 15:
864 can be fit into 7040 8 times, resulting in a remainder of 128.
Write down 8 as next digit of the result. 
Result so far: 25276.1585648
Subtract 6912 from 7040 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 16:
1280 divided by 864 is 1 with a remainder of 416.
Write down 1 as next digit of the result. 
Result so far: 25276.15856481
Subtracting 864 from 1280 leaves us with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

After the division, we end up with 25276.15856481 and a remainder of 4.16e-07.