Let's divide 12839393 by 210
We want to figure out the number of times 12839393 can be divided by 210.

Advancing to step 1:
The number 210 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 210

Step 2:
The number 210 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 210

Advancing to step 3:
210 can be fit into 128 0 times, resulting in a remainder of 128.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 128 to get 128.
Bring next digit (3) of the dividend behind the 128 and repeat the process: 1283 / 210

Let's proceed to step 4:
210 goes into 1283 6 times with a remainder of 23.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 1260 from 1283 leaves us with 23.
Append the next digit (9) from the dividend to 23 and continue with: 239 / 210

Let's proceed to step 5:
If we divide 239 by 210, we get 1 and a remainder of 29.
The next digit of our result is 1. 
Result so far: 61.0
If we subtract 210 from 239, we get 29.
Include the next digit (3) from the dividend after 29, then repeat: 293 / 210

Advancing to step 6:
210 can be fit into 293 1 times, resulting in a remainder of 83.
Put 1 as the next digit of the answer. 
Result so far: 611.0
If we subtract 210 from 293, we get 83.
Include the next digit (9) from the dividend after 83, then repeat: 839 / 210

Let's proceed to step 7:
839 divided by 210 is 3 with a remainder of 209.
Put 3 as the next digit of the answer. 
Result so far: 6113.0
The remainder is 209 after subtracting 630 from 839.
Fetch the next digit (3) from the dividend, attach it to 209 and continue: 2093 / 210

Let's proceed to step 8:
The number 210 fits into 2093 9 times, leaving a remainder of 203.
The number 9 becomes the next digit in our result. 
Result so far: 61139.0
Subtract 1890 from 2093 to get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Step 9:
2030 divided by 210 is 9 with a remainder of 140.
The number 9 becomes the next digit in our result. 
Result so far: 61139.9
Subtracting 1890 from 2030 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 10:
210 can be fit into 1400 6 times, resulting in a remainder of 140.
Write down 6 as next digit of the result. 
Result so far: 61139.96
If we take 1260 away from 1400, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 11:
The number 210 fits into 1400 6 times, leaving a remainder of 140.
Record the quotient 6 as the next digit in the result. 
Result so far: 61139.966
Subtract 1260 from 1400 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final outcome is 61139.966, with a leftover of 0.014.