We're dividing 843439 by 77 
We want to figure out the number of times 843439 can be divided by 77.

Going ahead to step 1:
When dividing 8 by 77, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 77

Advancing to step 2:
When dividing 84 by 77, we get 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 77 from 84 to get 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 77

Step 3:
When dividing 73 by 77, we get 0 with a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 73 after subtracting 0 from 73.
Grab the next digit (4) from the dividend, add it to 73, then carry on: 734 / 77

Moving on to step 4:
77 goes into 734 9 times with a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 109.0
If we take 693 away from 734, we end up with 41.
Append the next digit (3) from the dividend to 41 and continue with: 413 / 77

Moving on to step 5:
The number 77 fits into 413 5 times, leaving a remainder of 28.
The next digit of our result is 5. 
Result so far: 1095.0
If we take 385 away from 413, we end up with 28.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 77

Advancing to step 6:
If we divide 289 by 77, we get 3 and a remainder of 58.
The next digit of our result is 3. 
Result so far: 10953.0
Subtract 231 from 289 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 7:
580 divided by 77 is 7 with a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 10953.7
Subtract 539 from 580 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 8:
The number 77 fits into 410 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 10953.75
If we subtract 385 from 410, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 9:
When dividing 250 by 77, we get 3 with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 10953.753
Deduct 231 from 250 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
The number 77 fits into 190 2 times, leaving a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 10953.7532
If we take 154 away from 190, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
77 goes into 360 4 times with a remainder of 52.
Use 4 as the next digit of our solution. 
Result so far: 10953.75324
Subtract 308 from 360 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 12:
If we divide 520 by 77, we get 6 and a remainder of 58.
Record the quotient 6 as the next digit in the result. 
Result so far: 10953.753246
Subtracting 462 from 520 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 13:
The number 77 fits into 580 7 times, leaving a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 10953.7532467
Subtract 539 from 580 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 14:
When dividing 410 by 77, we get 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 10953.75324675
Deduct 385 from 410 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 10953.75324675 and a remainder of 2.5e-08.