We divide 43426921 by 339
We want to figure out the number of times 43426921 can be divided by 339.

Moving on to step 1:
339 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 339

On to step 2:
339 goes into 43 0 times with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Include the next digit (4) from the dividend after 43, then repeat: 434 / 339

Going ahead to step 3:
339 can be fit into 434 1 times, resulting in a remainder of 95.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 339 from 434 and we're left with 95.
Append the next digit (2) from the dividend to 95 and continue with: 952 / 339

Step 4:
339 goes into 952 2 times with a remainder of 274.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 678 from 952 leaves us with 274.
Bring next digit (6) of the dividend behind the 274 and repeat the process: 2746 / 339

On to step 5:
The number 339 fits into 2746 8 times, leaving a remainder of 34.
Record the quotient 8 as the next digit in the result. 
Result so far: 128.0
Deduct 2712 from 2746 and we're left with 34.
Bring next digit (9) of the dividend behind the 34 and repeat the process: 349 / 339

Step 6:
339 can be fit into 349 1 times, resulting in a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1281.0
If we subtract 339 from 349, we get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 339

Let's proceed to step 7:
102 divided by 339 is 0 with a remainder of 102.
Use 0 as the next digit of our solution. 
Result so far: 12810.0
The remainder is 102 after subtracting 0 from 102.
Bring next digit (1) of the dividend behind the 102 and repeat the process: 1021 / 339

Moving on to step 8:
339 goes into 1021 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 128103.0
Deduct 1017 from 1021 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.

Moving on to step 9:
When dividing 40 by 339, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 128103.0
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 10:
When dividing 400 by 339, we get 1 with a remainder of 61.
Write down 1 as next digit of the result. 
Result so far: 128103.01
Subtracting 339 from 400 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 11:
The number 339 fits into 610 1 times, leaving a remainder of 271.
Record the quotient 1 as the next digit in the result. 
Result so far: 128103.011
If we subtract 339 from 610, we get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

The quotient of the division is 128103.011, and the remainder is 0.0271.