390186 ÷ 99 
We want to figure out the number of times 390186 can be divided by 99.

Advancing to step 1:
If we divide 3 by 99, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 99

Let's proceed to step 2:
The number 99 fits into 39 0 times, leaving a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Fetch the next digit (0) from the dividend, attach it to 39 and continue: 390 / 99

Step 3:
99 can be fit into 390 3 times, resulting in a remainder of 93.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 297 from 390, we get 93.
Bring next digit (1) of the dividend behind the 93 and repeat the process: 931 / 99

Moving on to step 4:
The number 99 fits into 931 9 times, leaving a remainder of 40.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we subtract 891 from 931, we get 40.
Bring next digit (8) of the dividend behind the 40 and repeat the process: 408 / 99

Moving on to step 5:
If we divide 408 by 99, we get 4 and a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 394.0
Deduct 396 from 408 and we're left with 12.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 99

On to step 6:
99 goes into 126 1 times with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 3941.0
Subtracting 99 from 126 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
When dividing 270 by 99, we get 2 with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 3941.2
Deduct 198 from 270 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 8:
If we divide 720 by 99, we get 7 and a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 3941.27
Subtract 693 from 720 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 9:
The number 99 fits into 270 2 times, leaving a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 3941.272
The remainder is 72 after subtracting 198 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 10:
99 can be fit into 720 7 times, resulting in a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 3941.2727
If we subtract 693 from 720, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 11:
The number 99 fits into 270 2 times, leaving a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 3941.27272
If we subtract 198 from 270, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 12:
If we divide 720 by 99, we get 7 and a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 3941.272727
Subtract 693 from 720 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 13:
When dividing 270 by 99, we get 2 with a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 3941.2727272
Subtracting 198 from 270 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 14:
The number 99 fits into 720 7 times, leaving a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 3941.27272727
Deduct 693 from 720 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final result is 3941.27272727 with a remainder of 2.7e-08.