390191 ÷ 86 
We're looking to find how many times 86 goes into 390191.

Going ahead to step 1:
When dividing 3 by 86, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 86

Going ahead to step 2:
When dividing 39 by 86, we get 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 86

Let's proceed to step 3:
86 goes into 390 4 times with a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 46 after subtracting 344 from 390.
Include the next digit (1) from the dividend after 46, then repeat: 461 / 86

Let's proceed to step 4:
When dividing 461 by 86, we get 5 with a remainder of 31.
Write down 5 as next digit of the result. 
Result so far: 45.0
Subtracting 430 from 461 leaves us with 31.
Grab the next digit (9) from the dividend, add it to 31, then carry on: 319 / 86

Advancing to step 5:
The number 86 fits into 319 3 times, leaving a remainder of 61.
Use 3 as the next digit of our solution. 
Result so far: 453.0
Deduct 258 from 319 and we're left with 61.
Fetch the next digit (1) from the dividend, attach it to 61 and continue: 611 / 86

Advancing to step 6:
86 can be fit into 611 7 times, resulting in a remainder of 9.
The next digit of our result is 7. 
Result so far: 4537.0
Subtract 602 from 611 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
If we divide 90 by 86, we get 1 and a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 4537.1
Deduct 86 from 90 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
86 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 4537.1
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
400 divided by 86 is 4 with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 4537.104
The remainder is 56 after subtracting 344 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 10:
When dividing 560 by 86, we get 6 with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 4537.1046
Subtract 516 from 560 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 11:
86 goes into 440 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4537.10465
Subtracting 430 from 440 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
86 goes into 100 1 times with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 4537.104651
Subtract 86 from 100 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 13:
When dividing 140 by 86, we get 1 with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 4537.1046511
If we subtract 86 from 140, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

After the division, we end up with 4537.1046511 and a remainder of 5.4e-07.