We look at the division of 21423648 by 269 
We want to divide 21423648 by 269.

Step 1:
2 divided by 269 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 269

Moving on to step 2:
21 divided by 269 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (4) from the dividend, add it to 21, then carry on: 214 / 269

Going ahead to step 3:
269 goes into 214 0 times with a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Fetch the next digit (2) from the dividend, attach it to 214 and continue: 2142 / 269

Let's proceed to step 4:
When dividing 2142 by 269, we get 7 with a remainder of 259.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 1883 from 2142 leaves us with 259.
Grab the next digit (3) from the dividend, add it to 259, then carry on: 2593 / 269

Moving on to step 5:
If we divide 2593 by 269, we get 9 and a remainder of 172.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
Subtracting 2421 from 2593 leaves us with 172.
Take the next digit (6) from the dividend and append it to 172, then repeat: 1726 / 269

Let's proceed to step 6:
1726 divided by 269 is 6 with a remainder of 112.
Record the quotient 6 as the next digit in the result. 
Result so far: 796.0
Subtract 1614 from 1726 to get 112.
Append the next digit (4) from the dividend to 112 and continue with: 1124 / 269

Step 7:
When dividing 1124 by 269, we get 4 with a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 7964.0
The remainder is 48 after subtracting 1076 from 1124.
Grab the next digit (8) from the dividend, add it to 48, then carry on: 488 / 269

On to step 8:
If we divide 488 by 269, we get 1 and a remainder of 219.
Record the quotient 1 as the next digit in the result. 
Result so far: 79641.0
The remainder is 219 after subtracting 269 from 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Step 9:
When dividing 2190 by 269, we get 8 with a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 79641.8
Subtract 2152 from 2190 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 10:
269 goes into 380 1 times with a remainder of 111.
Use 1 as the next digit of our solution. 
Result so far: 79641.81
Subtracting 269 from 380 leaves us with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Step 11:
1110 divided by 269 is 4 with a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 79641.814
The remainder is 34 after subtracting 1076 from 1110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
When dividing 340 by 269, we get 1 with a remainder of 71.
Put 1 as the next digit of the answer. 
Result so far: 79641.8141
If we subtract 269 from 340, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 13:
269 can be fit into 710 2 times, resulting in a remainder of 172.
Use 2 as the next digit of our solution. 
Result so far: 79641.81412
Subtract 538 from 710 to get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 14:
1720 divided by 269 is 6 with a remainder of 106.
Put 6 as the next digit of the answer. 
Result so far: 79641.814126
Subtracting 1614 from 1720 leaves us with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Going ahead to step 15:
If we divide 1060 by 269, we get 3 and a remainder of 253.
The next digit of our result is 3. 
Result so far: 79641.8141263
Deduct 807 from 1060 and we're left with 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Advancing to step 16:
When dividing 2530 by 269, we get 9 with a remainder of 109.
Record the quotient 9 as the next digit in the result. 
Result so far: 79641.81412639
Deduct 2421 from 2530 and we're left with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

After the division, we end up with 79641.81412639 and a remainder of 1.09e-07.