We're dividing 12137961 by 425 
We want to figure out the number of times 12137961 can be divided by 425.

Let's proceed to step 1:
The number 425 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 425

On to step 2:
425 goes into 12 0 times with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 425

On to step 3:
When dividing 121 by 425, we get 0 with a remainder of 121.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 121 leaves us with 121.
Fetch the next digit (3) from the dividend, attach it to 121 and continue: 1213 / 425

Moving on to step 4:
If we divide 1213 by 425, we get 2 and a remainder of 363.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 850 from 1213 leaves us with 363.
Bring next digit (7) of the dividend behind the 363 and repeat the process: 3637 / 425

Let's proceed to step 5:
If we divide 3637 by 425, we get 8 and a remainder of 237.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we take 3400 away from 3637, we end up with 237.
Fetch the next digit (9) from the dividend, attach it to 237 and continue: 2379 / 425

Advancing to step 6:
425 can be fit into 2379 5 times, resulting in a remainder of 254.
Put 5 as the next digit of the answer. 
Result so far: 285.0
Deduct 2125 from 2379 and we're left with 254.
Append the next digit (6) from the dividend to 254 and continue with: 2546 / 425

Advancing to step 7:
425 can be fit into 2546 5 times, resulting in a remainder of 421.
Use 5 as the next digit of our solution. 
Result so far: 2855.0
The remainder is 421 after subtracting 2125 from 2546.
Take the next digit (1) from the dividend and append it to 421, then repeat: 4211 / 425

Step 8:
4211 divided by 425 is 9 with a remainder of 386.
The next digit of our result is 9. 
Result so far: 28559.0
Subtracting 3825 from 4211 leaves us with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Step 9:
If we divide 3860 by 425, we get 9 and a remainder of 35.
Use 9 as the next digit of our solution. 
Result so far: 28559.9
The remainder is 35 after subtracting 3825 from 3860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 10:
The number 425 fits into 350 0 times, leaving a remainder of 350.
Put 0 as the next digit of the answer. 
Result so far: 28559.9
If we subtract 0 from 350, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 11:
425 goes into 3500 8 times with a remainder of 100.
Put 8 as the next digit of the answer. 
Result so far: 28559.908
Subtracting 3400 from 3500 leaves us 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.

Let's proceed to step 12:
1000 divided by 425 is 2 with a remainder of 150.
Record the quotient 2 as the next digit in the result. 
Result so far: 28559.9082
The remainder is 150 after subtracting 850 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 13:
If we divide 1500 by 425, we get 3 and a remainder of 225.
Use 3 as the next digit of our solution. 
Result so far: 28559.90823
If we take 1275 away from 1500, we end up with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 14:
425 goes into 2250 5 times with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 28559.908235
If we subtract 2125 from 2250, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Step 15:
The number 425 fits into 1250 2 times, leaving a remainder of 400.
The number 2 becomes the next digit in our result. 
Result so far: 28559.9082352
Deduct 850 from 1250 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 16:
4000 divided by 425 is 9 with a remainder of 175.
The next digit of our result is 9. 
Result so far: 28559.90823529
Subtracting 3825 from 4000 leaves us with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

The final outcome is 28559.90823529, with a leftover of 1.75e-07.