We look at the division of 42979560 by 339 
We want to figure out the number of times 42979560 can be divided by 339.

On to step 1:
339 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 339

Step 2:
The number 339 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Append the next digit (9) from the dividend to 42 and continue with: 429 / 339

Going ahead to step 3:
429 divided by 339 is 1 with a remainder of 90.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 339 from 429 and we're left with 90.
Append the next digit (7) from the dividend to 90 and continue with: 907 / 339

Let's proceed to step 4:
When dividing 907 by 339, we get 2 with a remainder of 229.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we subtract 678 from 907, we get 229.
Append the next digit (9) from the dividend to 229 and continue with: 2299 / 339

Step 5:
339 goes into 2299 6 times with a remainder of 265.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
The remainder is 265 after subtracting 2034 from 2299.
Bring next digit (5) of the dividend behind the 265 and repeat the process: 2655 / 339

Let's proceed to step 6:
339 can be fit into 2655 7 times, resulting in a remainder of 282.
Record the quotient 7 as the next digit in the result. 
Result so far: 1267.0
If we take 2373 away from 2655, we end up with 282.
Include the next digit (6) from the dividend after 282, then repeat: 2826 / 339

Going ahead to step 7:
The number 339 fits into 2826 8 times, leaving a remainder of 114.
Write down 8 as next digit of the result. 
Result so far: 12678.0
Deduct 2712 from 2826 and we're left with 114.
Bring next digit (0) of the dividend behind the 114 and repeat the process: 1140 / 339

Let's proceed to step 8:
339 goes into 1140 3 times with a remainder of 123.
The number 3 becomes the next digit in our result. 
Result so far: 126783.0
Subtract 1017 from 1140 to get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

On to step 9:
When dividing 1230 by 339, we get 3 with a remainder of 213.
Put 3 as the next digit of the answer. 
Result so far: 126783.3
Deduct 1017 from 1230 and we're left with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Let's proceed to step 10:
If we divide 2130 by 339, we get 6 and a remainder of 96.
Record the quotient 6 as the next digit in the result. 
Result so far: 126783.36
If we take 2034 away from 2130, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 11:
If we divide 960 by 339, we get 2 and a remainder of 282.
Put 2 as the next digit of the answer. 
Result so far: 126783.362
If we subtract 678 from 960, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Advancing to step 12:
When dividing 2820 by 339, we get 8 with a remainder of 108.
Put 8 as the next digit of the answer. 
Result so far: 126783.3628
Subtracting 2712 from 2820 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 13:
339 goes into 1080 3 times with a remainder of 63.
The next digit of our result is 3. 
Result so far: 126783.36283
The remainder is 63 after subtracting 1017 from 1080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 14:
If we divide 630 by 339, we get 1 and a remainder of 291.
Put 1 as the next digit of the answer. 
Result so far: 126783.362831
If we take 339 away from 630, we end up with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Moving on to step 15:
339 can be fit into 2910 8 times, resulting in a remainder of 198.
Record the quotient 8 as the next digit in the result. 
Result so far: 126783.3628318
Subtracting 2712 from 2910 leaves us with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Advancing to step 16:
If we divide 1980 by 339, we get 5 and a remainder of 285.
Write down 5 as next digit of the result. 
Result so far: 126783.36283185
Subtracting 1695 from 1980 leaves us with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

The final result is 126783.36283185 with a remainder of 2.85e-07.