99639842 ÷ 84 
We want to divide 99639842 by 84.

Going ahead to step 1:
The number 84 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 84

Moving on to step 2:
84 can be fit into 99 1 times, resulting in a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 84 from 99 to get 15.
Append the next digit (6) from the dividend to 15 and continue with: 156 / 84

Going ahead to step 3:
84 can be fit into 156 1 times, resulting in a remainder of 72.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 72 after subtracting 84 from 156.
Append the next digit (3) from the dividend to 72 and continue with: 723 / 84

Step 4:
When dividing 723 by 84, we get 8 with a remainder of 51.
Write down 8 as next digit of the result. 
Result so far: 118.0
Subtracting 672 from 723 leaves us with 51.
Bring next digit (9) of the dividend behind the 51 and repeat the process: 519 / 84

On to step 5:
84 can be fit into 519 6 times, resulting in a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 1186.0
Subtract 504 from 519 to get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 84

Let's proceed to step 6:
84 can be fit into 158 1 times, resulting in a remainder of 74.
Use 1 as the next digit of our solution. 
Result so far: 11861.0
Subtract 84 from 158 to get 74.
Grab the next digit (4) from the dividend, add it to 74, then carry on: 744 / 84

Step 7:
84 can be fit into 744 8 times, resulting in a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 118618.0
Subtract 672 from 744 to get 72.
Grab the next digit (2) from the dividend, add it to 72, then carry on: 722 / 84

Moving on to step 8:
84 goes into 722 8 times with a remainder of 50.
Write down 8 as next digit of the result. 
Result so far: 1186188.0
Deduct 672 from 722 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 9:
If we divide 500 by 84, we get 5 and a remainder of 80.
Use 5 as the next digit of our solution. 
Result so far: 1186188.5
Deduct 420 from 500 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 10:
84 can be fit into 800 9 times, resulting in a remainder of 44.
Use 9 as the next digit of our solution. 
Result so far: 1186188.59
Subtracting 756 from 800 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 11:
If we divide 440 by 84, we get 5 and a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 1186188.595
If we take 420 away from 440, we end up 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.

Moving on to step 12:
When dividing 200 by 84, we get 2 with a remainder of 32.
The next digit of our result is 2. 
Result so far: 1186188.5952
The remainder is 32 after subtracting 168 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 13:
320 divided by 84 is 3 with a remainder of 68.
Use 3 as the next digit of our solution. 
Result so far: 1186188.59523
The remainder is 68 after subtracting 252 from 320.
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 14:
The number 84 fits into 680 8 times, leaving a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 1186188.595238
Subtract 672 from 680 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 15:
80 divided by 84 is 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 1186188.595238
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 16:
When dividing 800 by 84, we get 9 with a remainder of 44.
The next digit of our result is 9. 
Result so far: 1186188.59523809
Subtracting 756 from 800 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 1186188.59523809, with a leftover of 4.4e-08.