We look at the division of 21428120 by 260 
Let's see how many times 260 fits into 21428120.

On to step 1:
If we divide 2 by 260, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 260

Advancing to step 2:
When dividing 21 by 260, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 260

Advancing to step 3:
260 goes into 214 0 times with a remainder of 214.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 214 to get 214.
Fetch the next digit (2) from the dividend, attach it to 214 and continue: 2142 / 260

Advancing to step 4:
When dividing 2142 by 260, we get 8 with a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 2080 from 2142, we get 62.
Fetch the next digit (8) from the dividend, attach it to 62 and continue: 628 / 260

Moving on to step 5:
If we divide 628 by 260, we get 2 and a remainder of 108.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
The remainder is 108 after subtracting 520 from 628.
Include the next digit (1) from the dividend after 108, then repeat: 1081 / 260

Let's proceed to step 6:
When dividing 1081 by 260, we get 4 with a remainder of 41.
The next digit of our result is 4. 
Result so far: 824.0
Subtract 1040 from 1081 to get 41.
Grab the next digit (2) from the dividend, add it to 41, then carry on: 412 / 260

On to step 7:
260 can be fit into 412 1 times, resulting in a remainder of 152.
The next digit of our result is 1. 
Result so far: 8241.0
If we take 260 away from 412, we end up with 152.
Fetch the next digit (0) from the dividend, attach it to 152 and continue: 1520 / 260

On to step 8:
When dividing 1520 by 260, we get 5 with a remainder of 220.
The number 5 becomes the next digit in our result. 
Result so far: 82415.0
If we subtract 1300 from 1520, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 9:
260 goes into 2200 8 times with a remainder of 120.
Use 8 as the next digit of our solution. 
Result so far: 82415.8
Subtract 2080 from 2200 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 10:
260 goes into 1200 4 times with a remainder of 160.
Record the quotient 4 as the next digit in the result. 
Result so far: 82415.84
Deduct 1040 from 1200 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 11:
260 goes into 1600 6 times with a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 82415.846
If we take 1560 away from 1600, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 12:
260 can be fit into 400 1 times, resulting in a remainder of 140.
The number 1 becomes the next digit in our result. 
Result so far: 82415.8461
Deduct 260 from 400 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 13:
260 can be fit into 1400 5 times, resulting in a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 82415.84615
If we take 1300 away from 1400, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 14:
260 goes into 1000 3 times with a remainder of 220.
The next digit of our result is 3. 
Result so far: 82415.846153
If we take 780 away from 1000, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 15:
The number 260 fits into 2200 8 times, leaving a remainder of 120.
Put 8 as the next digit of the answer. 
Result so far: 82415.8461538
Subtract 2080 from 2200 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 16:
The number 260 fits into 1200 4 times, leaving a remainder of 160.
The number 4 becomes the next digit in our result. 
Result so far: 82415.84615384
The remainder is 160 after subtracting 1040 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

In conclusion, the division gives 82415.84615384 with a balance of 1.6e-07.