639538 ÷ 43 
We want to figure out the number of times 639538 can be divided by 43.

Moving on to step 1:
43 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 43

Let's proceed to step 2:
43 goes into 63 1 times with a remainder of 20.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 43 from 63, we get 20.
Grab the next digit (9) from the dividend, add it to 20, then carry on: 209 / 43

On to step 3:
43 can be fit into 209 4 times, resulting in a remainder of 37.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 172 from 209 leaves us with 37.
Fetch the next digit (5) from the dividend, attach it to 37 and continue: 375 / 43

Step 4:
If we divide 375 by 43, we get 8 and a remainder of 31.
Put 8 as the next digit of the answer. 
Result so far: 148.0
If we subtract 344 from 375, we get 31.
Append the next digit (3) from the dividend to 31 and continue with: 313 / 43

Moving on to step 5:
313 divided by 43 is 7 with a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 1487.0
Subtracting 301 from 313 leaves us with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 43

Moving on to step 6:
If we divide 128 by 43, we get 2 and a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 14872.0
Subtract 86 from 128 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 7:
420 divided by 43 is 9 with a remainder of 33.
The next digit of our result is 9. 
Result so far: 14872.9
If we subtract 387 from 420, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 8:
330 divided by 43 is 7 with a remainder of 29.
The next digit of our result is 7. 
Result so far: 14872.97
The remainder is 29 after subtracting 301 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 9:
290 divided by 43 is 6 with a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 14872.976
Deduct 258 from 290 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.

Moving on to step 10:
320 divided by 43 is 7 with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 14872.9767
If we subtract 301 from 320, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 11:
When dividing 190 by 43, we get 4 with a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 14872.97674
Deduct 172 from 190 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 12:
43 goes into 180 4 times with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 14872.976744
Subtract 172 from 180 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 14872.976744 and a remainder of 8e-07.