40643239 divided by 838 
We want to figure out the number of times 40643239 can be divided by 838.

On to step 1:
The number 838 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 838

Advancing to step 2:
40 divided by 838 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Fetch the next digit (6) from the dividend, attach it to 40 and continue: 406 / 838

On to step 3:
406 divided by 838 is 0 with a remainder of 406.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 406 after subtracting 0 from 406.
Grab the next digit (4) from the dividend, add it to 406, then carry on: 4064 / 838

Going ahead to step 4:
When dividing 4064 by 838, we get 4 with a remainder of 712.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 712 after subtracting 3352 from 4064.
Bring next digit (3) of the dividend behind the 712 and repeat the process: 7123 / 838

Going ahead to step 5:
838 can be fit into 7123 8 times, resulting in a remainder of 419.
Use 8 as the next digit of our solution. 
Result so far: 48.0
Subtracting 6704 from 7123 leaves us with 419.
Include the next digit (2) from the dividend after 419, then repeat: 4192 / 838

Moving on to step 6:
4192 divided by 838 is 5 with a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 485.0
If we take 4190 away from 4192, we end up with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 838

Going ahead to step 7:
23 divided by 838 is 0 with a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 4850.0
Subtract 0 from 23 to get 23.
Bring next digit (9) of the dividend behind the 23 and repeat the process: 239 / 838

Let's proceed to step 8:
838 goes into 239 0 times with a remainder of 239.
Write down 0 as next digit of the result. 
Result so far: 48500.0
Subtract 0 from 239 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Step 9:
838 goes into 2390 2 times with a remainder of 714.
Record the quotient 2 as the next digit in the result. 
Result so far: 48500.2
Subtracting 1676 from 2390 leaves us with 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

Going ahead to step 10:
The number 838 fits into 7140 8 times, leaving a remainder of 436.
The number 8 becomes the next digit in our result. 
Result so far: 48500.28
Deduct 6704 from 7140 and we're left with 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Moving on to step 11:
838 goes into 4360 5 times with a remainder of 170.
Write down 5 as next digit of the result. 
Result so far: 48500.285
The remainder is 170 after subtracting 4190 from 4360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 12:
The number 838 fits into 1700 2 times, leaving a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 48500.2852
If we take 1676 away from 1700, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
The number 838 fits into 240 0 times, leaving a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 48500.2852
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 14:
If we divide 2400 by 838, we get 2 and a remainder of 724.
Record the quotient 2 as the next digit in the result. 
Result so far: 48500.285202
If we take 1676 away from 2400, we end up with 724.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Advancing to step 15:
The number 838 fits into 7240 8 times, leaving a remainder of 536.
The number 8 becomes the next digit in our result. 
Result so far: 48500.2852028
Deduct 6704 from 7240 and we're left with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Moving on to step 16:
The number 838 fits into 5360 6 times, leaving a remainder of 332.
The number 6 becomes the next digit in our result. 
Result so far: 48500.28520286
The remainder is 332 after subtracting 5028 from 5360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

The final result is 48500.28520286 with a remainder of 3.32e-07.