Let's divide 621370 by 31
Let's see how many times 31 fits into 621370.

On to step 1:
If we divide 6 by 31, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 31

Step 2:
31 can be fit into 62 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 62 from 62 and we're left with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 31

Step 3:
The number 31 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtract 0 from 1 to get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 31

Let's proceed to step 4:
The number 31 fits into 13 0 times, leaving a remainder of 13.
The next digit of our result is 0. 
Result so far: 200.0
The remainder is 13 after subtracting 0 from 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 31

Moving on to step 5:
The number 31 fits into 137 4 times, leaving a remainder of 13.
The next digit of our result is 4. 
Result so far: 2004.0
Subtracting 124 from 137 leaves us with 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 31

Going ahead to step 6:
31 goes into 130 4 times with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 20044.0
Subtract 124 from 130 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
The number 31 fits into 60 1 times, leaving a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 20044.1
If we take 31 away from 60, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 8:
31 goes into 290 9 times with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 20044.19
If we take 279 away from 290, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
31 can be fit into 110 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 20044.193
Subtract 93 from 110 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 10:
If we divide 170 by 31, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 20044.1935
Deduct 155 from 170 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 11:
31 goes into 150 4 times with a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 20044.19354
If we take 124 away from 150, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 12:
260 divided by 31 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 20044.193548
If we take 248 away from 260, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
120 divided by 31 is 3 with a remainder of 27.
Write down 3 as next digit of the result. 
Result so far: 20044.1935483
If we take 93 away from 120, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 14:
The number 31 fits into 270 8 times, leaving a remainder of 22.
The next digit of our result is 8. 
Result so far: 20044.19354838
The remainder is 22 after subtracting 248 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

After the division, we end up with 20044.19354838 and a remainder of 2.2e-08.