510493 ÷ 39 
We want to figure out the number of times 510493 can be divided by 39.

Advancing to step 1:
39 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 39

Going ahead to step 2:
The number 39 fits into 51 1 times, leaving a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 39 from 51 and we're left with 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 39

On to step 3:
120 divided by 39 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 117 from 120 to get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 39

Advancing to step 4:
When dividing 34 by 39, we get 0 with a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 130.0
If we subtract 0 from 34, we get 34.
Fetch the next digit (9) from the dividend, attach it to 34 and continue: 349 / 39

Moving on to step 5:
If we divide 349 by 39, we get 8 and a remainder of 37.
The next digit of our result is 8. 
Result so far: 1308.0
If we subtract 312 from 349, we get 37.
Take the next digit (3) from the dividend and append it to 37, then repeat: 373 / 39

Let's proceed to step 6:
39 can be fit into 373 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 13089.0
Deduct 351 from 373 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.

Step 7:
39 can be fit into 220 5 times, resulting in a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 13089.5
If we subtract 195 from 220, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 8:
39 goes into 250 6 times with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 13089.56
Subtracting 234 from 250 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.

Going ahead to step 9:
When dividing 160 by 39, we get 4 with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 13089.564
The remainder is 4 after subtracting 156 from 160.
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:
39 goes into 40 1 times with a remainder of 1.
The next digit of our result is 1. 
Result so far: 13089.5641
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
If we divide 10 by 39, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 13089.5641
If we take 0 away from 10, we end up 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.

Let's proceed to step 12:
If we divide 100 by 39, we get 2 and a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 13089.564102
Subtracting 78 from 100 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.

Step 13:
The number 39 fits into 220 5 times, leaving a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 13089.5641025
Subtract 195 from 220 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 14:
250 divided by 39 is 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 13089.56410256
Deduct 234 from 250 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.

The final result is 13089.56410256 with a remainder of 1.6e-08.