Let's divide 42205091 by 399
We want to divide 42205091 by 399.

Let's proceed to step 1:
When dividing 4 by 399, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 399

Going ahead to step 2:
42 divided by 399 is 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 399

Moving on to step 3:
399 goes into 422 1 times with a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 399 from 422 and we're left with 23.
Include the next digit (0) from the dividend after 23, then repeat: 230 / 399

Advancing to step 4:
When dividing 230 by 399, we get 0 with a remainder of 230.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 230, we get 230.
Take the next digit (5) from the dividend and append it to 230, then repeat: 2305 / 399

Let's proceed to step 5:
399 goes into 2305 5 times with a remainder of 310.
Use 5 as the next digit of our solution. 
Result so far: 105.0
Subtracting 1995 from 2305 leaves us with 310.
Fetch the next digit (0) from the dividend, attach it to 310 and continue: 3100 / 399

Let's proceed to step 6:
399 goes into 3100 7 times with a remainder of 307.
Use 7 as the next digit of our solution. 
Result so far: 1057.0
The remainder is 307 after subtracting 2793 from 3100.
Grab the next digit (9) from the dividend, add it to 307, then carry on: 3079 / 399

Going ahead to step 7:
The number 399 fits into 3079 7 times, leaving a remainder of 286.
Put 7 as the next digit of the answer. 
Result so far: 10577.0
If we take 2793 away from 3079, we end up with 286.
Take the next digit (1) from the dividend and append it to 286, then repeat: 2861 / 399

Step 8:
2861 divided by 399 is 7 with a remainder of 68.
Put 7 as the next digit of the answer. 
Result so far: 105777.0
The remainder is 68 after subtracting 2793 from 2861.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
The number 399 fits into 680 1 times, leaving a remainder of 281.
The number 1 becomes the next digit in our result. 
Result so far: 105777.1
If we take 399 away from 680, we end up with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Advancing to step 10:
The number 399 fits into 2810 7 times, leaving a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 105777.17
The remainder is 17 after subtracting 2793 from 2810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 11:
399 can be fit into 170 0 times, resulting in a remainder of 170.
Write down 0 as next digit of the result. 
Result so far: 105777.17
If we subtract 0 from 170, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 12:
The number 399 fits into 1700 4 times, leaving a remainder of 104.
Put 4 as the next digit of the answer. 
Result so far: 105777.1704
If we subtract 1596 from 1700, we get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 13:
When dividing 1040 by 399, we get 2 with a remainder of 242.
The next digit of our result is 2. 
Result so far: 105777.17042
Subtracting 798 from 1040 leaves us with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Moving on to step 14:
The number 399 fits into 2420 6 times, leaving a remainder of 26.
Record the quotient 6 as the next digit in the result. 
Result so far: 105777.170426
If we subtract 2394 from 2420, we get 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 15:
The number 399 fits into 260 0 times, leaving a remainder of 260.
Write down 0 as next digit of the result. 
Result so far: 105777.170426
The remainder is 260 after subtracting 0 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 16:
The number 399 fits into 2600 6 times, leaving a remainder of 206.
Record the quotient 6 as the next digit in the result. 
Result so far: 105777.17042606
If we take 2394 away from 2600, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

After the division, we end up with 105777.17042606 and a remainder of 2.06e-07.