We're dividing 39343871 by 641 
We want to figure out the number of times 39343871 can be divided by 641.

Step 1:
641 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 641

Going ahead to step 2:
641 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Include the next digit (3) from the dividend after 39, then repeat: 393 / 641

Let's proceed to step 3:
641 can be fit into 393 0 times, resulting in a remainder of 393.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 393, we get 393.
Append the next digit (4) from the dividend to 393 and continue with: 3934 / 641

Let's proceed to step 4:
641 goes into 3934 6 times with a remainder of 88.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 3846 from 3934 to get 88.
Grab the next digit (3) from the dividend, add it to 88, then carry on: 883 / 641

On to step 5:
If we divide 883 by 641, we get 1 and a remainder of 242.
Put 1 as the next digit of the answer. 
Result so far: 61.0
If we subtract 641 from 883, we get 242.
Include the next digit (8) from the dividend after 242, then repeat: 2428 / 641

Moving on to step 6:
The number 641 fits into 2428 3 times, leaving a remainder of 505.
The number 3 becomes the next digit in our result. 
Result so far: 613.0
If we take 1923 away from 2428, we end up with 505.
Include the next digit (7) from the dividend after 505, then repeat: 5057 / 641

Step 7:
The number 641 fits into 5057 7 times, leaving a remainder of 570.
Write down 7 as next digit of the result. 
Result so far: 6137.0
If we subtract 4487 from 5057, we get 570.
Fetch the next digit (1) from the dividend, attach it to 570 and continue: 5701 / 641

Step 8:
If we divide 5701 by 641, we get 8 and a remainder of 573.
Put 8 as the next digit of the answer. 
Result so far: 61378.0
If we subtract 5128 from 5701, we get 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5730, and continue the process.

Moving on to step 9:
641 can be fit into 5730 8 times, resulting in a remainder of 602.
Use 8 as the next digit of our solution. 
Result so far: 61378.8
Deduct 5128 from 5730 and we're left with 602.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Moving on to step 10:
641 goes into 6020 9 times with a remainder of 251.
Use 9 as the next digit of our solution. 
Result so far: 61378.89
If we take 5769 away from 6020, we end up with 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Moving on to step 11:
The number 641 fits into 2510 3 times, leaving a remainder of 587.
Record the quotient 3 as the next digit in the result. 
Result so far: 61378.893
The remainder is 587 after subtracting 1923 from 2510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Advancing to step 12:
If we divide 5870 by 641, we get 9 and a remainder of 101.
The next digit of our result is 9. 
Result so far: 61378.8939
Subtract 5769 from 5870 to get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

On to step 13:
641 goes into 1010 1 times with a remainder of 369.
The next digit of our result is 1. 
Result so far: 61378.89391
The remainder is 369 after subtracting 641 from 1010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Moving on to step 14:
641 goes into 3690 5 times with a remainder of 485.
Record the quotient 5 as the next digit in the result. 
Result so far: 61378.893915
The remainder is 485 after subtracting 3205 from 3690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Advancing to step 15:
The number 641 fits into 4850 7 times, leaving a remainder of 363.
Record the quotient 7 as the next digit in the result. 
Result so far: 61378.8939157
Subtract 4487 from 4850 to get 363.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

On to step 16:
When dividing 3630 by 641, we get 5 with a remainder of 425.
The number 5 becomes the next digit in our result. 
Result so far: 61378.89391575
If we subtract 3205 from 3630, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

In conclusion, the division gives 61378.89391575 with a balance of 4.25e-07.