We look at the division of 251212 by 42 
We're looking to find how many times 42 goes into 251212.

Advancing to step 1:
42 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 42

Step 2:
If we divide 25 by 42, we get 0 and a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Include the next digit (1) from the dividend after 25, then repeat: 251 / 42

Moving on to step 3:
If we divide 251 by 42, we get 5 and a remainder of 41.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 210 from 251 leaves us with 41.
Take the next digit (2) from the dividend and append it to 41, then repeat: 412 / 42

Moving on to step 4:
412 divided by 42 is 9 with a remainder of 34.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Subtracting 378 from 412 leaves us with 34.
Bring next digit (1) of the dividend behind the 34 and repeat the process: 341 / 42

Advancing to step 5:
341 divided by 42 is 8 with a remainder of 5.
The next digit of our result is 8. 
Result so far: 598.0
If we take 336 away from 341, we end up with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 42

Step 6:
When dividing 52 by 42, we get 1 with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 5981.0
The remainder is 10 after subtracting 42 from 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
When dividing 100 by 42, we get 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 5981.2
If we take 84 away from 100, we end up with 16.
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 8:
42 goes into 160 3 times with a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 5981.23
Deduct 126 from 160 and we're left with 34.
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 9:
42 can be fit into 340 8 times, resulting in a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 5981.238
Subtracting 336 from 340 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 10:
When dividing 40 by 42, we get 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 5981.238
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
When dividing 400 by 42, we get 9 with a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 5981.23809
Subtract 378 from 400 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 12:
The number 42 fits into 220 5 times, leaving a remainder of 10.
The next digit of our result is 5. 
Result so far: 5981.238095
Subtracting 210 from 220 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.

On to step 13:
100 divided by 42 is 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 5981.2380952
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
42 can be fit into 160 3 times, resulting in a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 5981.23809523
If we take 126 away from 160, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

The final result is 5981.23809523 with a remainder of 3.4e-08.