We look at the division of 939879 by 42 
We want to figure out the number of times 939879 can be divided by 42.

Let's proceed to step 1:
The number 42 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 42

Advancing to step 2:
When dividing 93 by 42, we get 2 with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 84 from 93 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 42

Going ahead to step 3:
The number 42 fits into 99 2 times, leaving a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
If we take 84 away from 99, we end up with 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 42

Moving on to step 4:
42 can be fit into 158 3 times, resulting in a remainder of 32.
Use 3 as the next digit of our solution. 
Result so far: 223.0
Deduct 126 from 158 and we're left with 32.
Fetch the next digit (7) from the dividend, attach it to 32 and continue: 327 / 42

Advancing to step 5:
If we divide 327 by 42, we get 7 and a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 2237.0
If we subtract 294 from 327, we get 33.
Bring next digit (9) of the dividend behind the 33 and repeat the process: 339 / 42

Step 6:
42 goes into 339 8 times with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 22378.0
Subtracting 336 from 339 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
42 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 22378.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
42 can be fit into 300 7 times, resulting in a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 22378.07
Deduct 294 from 300 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
If we divide 60 by 42, we get 1 and a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 22378.071
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
42 can be fit into 180 4 times, resulting in a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 22378.0714
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 22378.07142
Subtracting 84 from 120 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 12:
360 divided by 42 is 8 with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 22378.071428
If we subtract 336 from 360, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
When dividing 240 by 42, we get 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 22378.0714285
Deduct 210 from 240 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 14:
42 goes into 300 7 times with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 22378.07142857
If we take 294 away from 300, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 22378.07142857, with a leftover of 6e-09.