Let's divide 420015 by 31
Our goal is to divide 420015 by 31.

Advancing to step 1:
31 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 31

Advancing to step 2:
The number 31 fits into 42 1 times, leaving a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 11 after subtracting 31 from 42.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 31

Advancing to step 3:
31 goes into 110 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 93 from 110 leaves us with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 31

Advancing to step 4:
170 divided by 31 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 135.0
Subtracting 155 from 170 leaves us with 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 31

Advancing to step 5:
31 goes into 151 4 times with a remainder of 27.
Write down 4 as next digit of the result. 
Result so far: 1354.0
Deduct 124 from 151 and we're left with 27.
Take the next digit (5) from the dividend and append it to 27, then repeat: 275 / 31

Going ahead to step 6:
The number 31 fits into 275 8 times, leaving a remainder of 27.
Write down 8 as next digit of the result. 
Result so far: 13548.0
Subtract 248 from 275 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 7:
31 can be fit into 270 8 times, resulting in a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 13548.8
Subtracting 248 from 270 leaves us 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.

Moving on to step 8:
31 can be fit into 220 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 13548.87
Deduct 217 from 220 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
The number 31 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 13548.87
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
300 divided by 31 is 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 13548.8709
If we subtract 279 from 300, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 11:
When dividing 210 by 31, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 13548.87096
Subtracting 186 from 210 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
240 divided by 31 is 7 with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 13548.870967
The remainder is 23 after subtracting 217 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 13:
31 goes into 230 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 13548.8709677
If we take 217 away from 230, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 13548.8709677 with a remaining 1.3e-07.