We look at the division of 39420 by 47 
We want to divide 39420 by 47.

Let's proceed to step 1:
47 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 47

Let's proceed to step 2:
The number 47 fits into 39 0 times, leaving a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Bring next digit (4) of the dividend behind the 39 and repeat the process: 394 / 47

Advancing to step 3:
47 can be fit into 394 8 times, resulting in a remainder of 18.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 376 from 394 leaves us with 18.
Append the next digit (2) from the dividend to 18 and continue with: 182 / 47

Going ahead to step 4:
182 divided by 47 is 3 with a remainder of 41.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we take 141 away from 182, we end up with 41.
Append the next digit (0) from the dividend to 41 and continue with: 410 / 47

Advancing to step 5:
410 divided by 47 is 8 with a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 838.0
Subtract 376 from 410 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 6:
340 divided by 47 is 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 838.7
Deduct 329 from 340 and we're left 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.

Advancing to step 7:
110 divided by 47 is 2 with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 838.72
If we subtract 94 from 110, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 8:
If we divide 160 by 47, we get 3 and a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 838.723
Deduct 141 from 160 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 9:
47 goes into 190 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 838.7234
Deduct 188 from 190 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
When dividing 20 by 47, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 838.7234
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
47 can be fit into 200 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 838.723404
If we subtract 188 from 200, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 12:
47 can be fit into 120 2 times, resulting in a remainder of 26.
The next digit of our result is 2. 
Result so far: 838.7234042
Deduct 94 from 120 and we're left 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.

Step 13:
260 divided by 47 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 838.72340425
Deduct 235 from 260 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final outcome is 838.72340425, with a leftover of 2.5e-08.