Let's divide 86147939 by 42
We want to divide 86147939 by 42.

On to step 1:
8 divided by 42 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 42

On to step 2:
42 can be fit into 86 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 84 away from 86, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 42

Advancing to step 3:
21 divided by 42 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we take 0 away from 21, we end up with 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 42

Going ahead to step 4:
214 divided by 42 is 5 with a remainder of 4.
The next digit of our result is 5. 
Result so far: 205.0
The remainder is 4 after subtracting 210 from 214.
Take the next digit (7) from the dividend and append it to 4, then repeat: 47 / 42

Let's proceed to step 5:
47 divided by 42 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 2051.0
Subtracting 42 from 47 leaves us with 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 42

Going ahead to step 6:
The number 42 fits into 59 1 times, leaving a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 20511.0
Subtracting 42 from 59 leaves us with 17.
Grab the next digit (3) from the dividend, add it to 17, then carry on: 173 / 42

Step 7:
The number 42 fits into 173 4 times, leaving a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 205114.0
The remainder is 5 after subtracting 168 from 173.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 42

On to step 8:
42 can be fit into 59 1 times, resulting in a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 2051141.0
Deduct 42 from 59 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 9:
42 goes into 170 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 2051141.4
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 10:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 2051141.4
If we subtract 0 from 20, we get 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 11:
42 goes into 200 4 times with a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 2051141.404
Deduct 168 from 200 and we're left 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.

Going ahead to step 12:
42 can be fit into 320 7 times, resulting in a remainder of 26.
Use 7 as the next digit of our solution. 
Result so far: 2051141.4047
Deduct 294 from 320 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.

Moving on to step 13:
The number 42 fits into 260 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 2051141.40476
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.

Let's proceed to step 14:
42 goes into 80 1 times with a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 2051141.404761
The remainder is 38 after subtracting 42 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 15:
The number 42 fits into 380 9 times, leaving a remainder of 2.
The next digit of our result is 9. 
Result so far: 2051141.4047619
If we subtract 378 from 380, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 16:
42 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 2051141.4047619
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 2051141.4047619 with a remainder of 2e-08.