99809399 ÷ 42 
Our goal is to divide 99809399 by 42.

Step 1:
42 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 42

Let's proceed to step 2:
The number 42 fits into 99 2 times, leaving a remainder of 15.
The next digit of our result is 2. 
Result so far: 2.0
If we take 84 away from 99, we end up with 15.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 42

Moving on to step 3:
If we divide 158 by 42, we get 3 and a remainder of 32.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we subtract 126 from 158, we get 32.
Bring next digit (0) of the dividend behind the 32 and repeat the process: 320 / 42

Moving on to step 4:
If we divide 320 by 42, we get 7 and a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 237.0
Subtracting 294 from 320 leaves us with 26.
Take the next digit (9) from the dividend and append it to 26, then repeat: 269 / 42

Step 5:
The number 42 fits into 269 6 times, leaving a remainder of 17.
Use 6 as the next digit of our solution. 
Result so far: 2376.0
Subtracting 252 from 269 leaves us with 17.
Bring next digit (3) of the dividend behind the 17 and repeat the process: 173 / 42

Going ahead to step 6:
The number 42 fits into 173 4 times, leaving a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 23764.0
Deduct 168 from 173 and we're left with 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 42

Let's proceed to step 7:
When dividing 59 by 42, we get 1 with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 237641.0
The remainder is 17 after subtracting 42 from 59.
Grab the next digit (9) from the dividend, add it to 17, then carry on: 179 / 42

Moving on to step 8:
42 can be fit into 179 4 times, resulting in a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 2376414.0
The remainder is 11 after subtracting 168 from 179.
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 9:
If we divide 110 by 42, we get 2 and a remainder of 26.
The next digit of our result is 2. 
Result so far: 2376414.2
Deduct 84 from 110 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.

Advancing to step 10:
The number 42 fits into 260 6 times, leaving a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 2376414.26
Subtracting 252 from 260 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
80 divided by 42 is 1 with a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 2376414.261
Deduct 42 from 80 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 12:
380 divided by 42 is 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 2376414.2619
The remainder is 2 after subtracting 378 from 380.
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 13:
If we divide 20 by 42, we get 0 and a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 2376414.2619
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
The number 42 fits into 200 4 times, leaving a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 2376414.261904
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 15:
42 can be fit into 320 7 times, resulting in a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 2376414.2619047
Subtracting 294 from 320 leaves us 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.

Advancing to step 16:
If we divide 260 by 42, we get 6 and a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 2376414.26190476
If we take 252 away from 260, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 2376414.26190476 with a balance of 8e-09.