21351257 ÷ 925 
Let's see how many times 925 fits into 21351257.

Moving on to step 1:
925 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 925

Moving on to step 2:
If we divide 21 by 925, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 925

Moving on to step 3:
The number 925 fits into 213 0 times, leaving a remainder of 213.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 213, we get 213.
Take the next digit (5) from the dividend and append it to 213, then repeat: 2135 / 925

Step 4:
2135 divided by 925 is 2 with a remainder of 285.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 285 after subtracting 1850 from 2135.
Take the next digit (1) from the dividend and append it to 285, then repeat: 2851 / 925

Step 5:
925 can be fit into 2851 3 times, resulting in a remainder of 76.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
The remainder is 76 after subtracting 2775 from 2851.
Fetch the next digit (2) from the dividend, attach it to 76 and continue: 762 / 925

Let's proceed to step 6:
If we divide 762 by 925, we get 0 and a remainder of 762.
The number 0 becomes the next digit in our result. 
Result so far: 230.0
The remainder is 762 after subtracting 0 from 762.
Fetch the next digit (5) from the dividend, attach it to 762 and continue: 7625 / 925

Advancing to step 7:
The number 925 fits into 7625 8 times, leaving a remainder of 225.
The next digit of our result is 8. 
Result so far: 2308.0
If we subtract 7400 from 7625, we get 225.
Fetch the next digit (7) from the dividend, attach it to 225 and continue: 2257 / 925

Advancing to step 8:
2257 divided by 925 is 2 with a remainder of 407.
The next digit of our result is 2. 
Result so far: 23082.0
Subtracting 1850 from 2257 leaves us with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Step 9:
When dividing 4070 by 925, we get 4 with a remainder of 370.
Put 4 as the next digit of the answer. 
Result so far: 23082.4
Subtract 3700 from 4070 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Let's proceed to step 10:
When dividing 3700 by 925, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 23082.44
The remainder is 0 after subtracting 3700 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 23082.44 and a remainder of 0.0.