We look at the division of 312898 by 42 
Our goal is to divide 312898 by 42.

Advancing to step 1:
When dividing 3 by 42, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 42

Going ahead to step 2:
If we divide 31 by 42, we get 0 and a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Include the next digit (2) from the dividend after 31, then repeat: 312 / 42

Let's proceed to step 3:
If we divide 312 by 42, we get 7 and a remainder of 18.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 294 from 312 to get 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 42

Advancing to step 4:
188 divided by 42 is 4 with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
The remainder is 20 after subtracting 168 from 188.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 42

Going ahead to step 5:
When dividing 209 by 42, we get 4 with a remainder of 41.
Record the quotient 4 as the next digit in the result. 
Result so far: 744.0
If we take 168 away from 209, we end up with 41.
Append the next digit (8) from the dividend to 41 and continue with: 418 / 42

Going ahead to step 6:
42 can be fit into 418 9 times, resulting in a remainder of 40.
Use 9 as the next digit of our solution. 
Result so far: 7449.0
If we subtract 378 from 418, 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 7:
When dividing 400 by 42, we get 9 with a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 7449.9
Deduct 378 from 400 and we're left with 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 8:
42 can be fit into 220 5 times, resulting in a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 7449.95
Deduct 210 from 220 and we're left 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.

Step 9:
42 can be fit into 100 2 times, resulting in a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 7449.952
Deduct 84 from 100 and we're left 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.

Going ahead to step 10:
When dividing 160 by 42, we get 3 with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 7449.9523
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.

Advancing to step 11:
340 divided by 42 is 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 7449.95238
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.

Going ahead to step 12:
42 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 7449.95238
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 13:
42 can be fit into 400 9 times, resulting in a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 7449.9523809
If we subtract 378 from 400, we 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 14:
If we divide 220 by 42, we get 5 and a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 7449.95238095
If we subtract 210 from 220, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 7449.95238095 with a remainder of 1e-08.