We divide 21396148 by 258
We want to figure out the number of times 21396148 can be divided by 258.

On to step 1:
258 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 258

Step 2:
When dividing 21 by 258, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 258

Moving on to step 3:
If we divide 213 by 258, we get 0 and a remainder of 213.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 213 leaves us with 213.
Include the next digit (9) from the dividend after 213, then repeat: 2139 / 258

Moving on to step 4:
When dividing 2139 by 258, we get 8 with a remainder of 75.
The next digit of our result is 8. 
Result so far: 8.0
If we take 2064 away from 2139, we end up with 75.
Append the next digit (6) from the dividend to 75 and continue with: 756 / 258

On to step 5:
258 can be fit into 756 2 times, resulting in a remainder of 240.
The next digit of our result is 2. 
Result so far: 82.0
Subtract 516 from 756 to get 240.
Append the next digit (1) from the dividend to 240 and continue with: 2401 / 258

Step 6:
2401 divided by 258 is 9 with a remainder of 79.
The next digit of our result is 9. 
Result so far: 829.0
Deduct 2322 from 2401 and we're left with 79.
Grab the next digit (4) from the dividend, add it to 79, then carry on: 794 / 258

Moving on to step 7:
258 can be fit into 794 3 times, resulting in a remainder of 20.
The next digit of our result is 3. 
Result so far: 8293.0
Deduct 774 from 794 and we're left with 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 258

On to step 8:
If we divide 208 by 258, we get 0 and a remainder of 208.
The number 0 becomes the next digit in our result. 
Result so far: 82930.0
Subtract 0 from 208 to get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 9:
If we divide 2080 by 258, we get 8 and a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 82930.8
The remainder is 16 after subtracting 2064 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
If we divide 160 by 258, we get 0 and a remainder of 160.
The next digit of our result is 0. 
Result so far: 82930.8
Subtract 0 from 160 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 11:
258 goes into 1600 6 times with a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 82930.806
If we take 1548 away from 1600, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 12:
The number 258 fits into 520 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 82930.8062
Subtracting 516 from 520 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
258 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 82930.8062
Deduct 0 from 40 and we're left 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.

Going ahead to step 14:
If we divide 400 by 258, we get 1 and a remainder of 142.
The next digit of our result is 1. 
Result so far: 82930.806201
The remainder is 142 after subtracting 258 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

On to step 15:
When dividing 1420 by 258, we get 5 with a remainder of 130.
Put 5 as the next digit of the answer. 
Result so far: 82930.8062015
Deduct 1290 from 1420 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 16:
The number 258 fits into 1300 5 times, leaving a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 82930.80620155
Subtracting 1290 from 1300 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 82930.80620155 and a remainder of 1e-08.