We're dividing 77460256 by 646 
We want to divide 77460256 by 646.

Step 1:
If we divide 7 by 646, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 646

On to step 2:
77 divided by 646 is 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Append the next digit (4) from the dividend to 77 and continue with: 774 / 646

On to step 3:
774 divided by 646 is 1 with a remainder of 128.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 646 from 774 leaves us with 128.
Take the next digit (6) from the dividend and append it to 128, then repeat: 1286 / 646

On to step 4:
When dividing 1286 by 646, we get 1 with a remainder of 640.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 646 from 1286, we get 640.
Fetch the next digit (0) from the dividend, attach it to 640 and continue: 6400 / 646

On to step 5:
The number 646 fits into 6400 9 times, leaving a remainder of 586.
Use 9 as the next digit of our solution. 
Result so far: 119.0
Subtracting 5814 from 6400 leaves us with 586.
Fetch the next digit (2) from the dividend, attach it to 586 and continue: 5862 / 646

Let's proceed to step 6:
5862 divided by 646 is 9 with a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 1199.0
If we subtract 5814 from 5862, we get 48.
Take the next digit (5) from the dividend and append it to 48, then repeat: 485 / 646

On to step 7:
When dividing 485 by 646, we get 0 with a remainder of 485.
Record the quotient 0 as the next digit in the result. 
Result so far: 11990.0
Subtracting 0 from 485 leaves us with 485.
Grab the next digit (6) from the dividend, add it to 485, then carry on: 4856 / 646

Let's proceed to step 8:
646 can be fit into 4856 7 times, resulting in a remainder of 334.
The number 7 becomes the next digit in our result. 
Result so far: 119907.0
The remainder is 334 after subtracting 4522 from 4856.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Advancing to step 9:
When dividing 3340 by 646, we get 5 with a remainder of 110.
The number 5 becomes the next digit in our result. 
Result so far: 119907.5
Subtract 3230 from 3340 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 10:
If we divide 1100 by 646, we get 1 and a remainder of 454.
Write down 1 as next digit of the result. 
Result so far: 119907.51
The remainder is 454 after subtracting 646 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Advancing to step 11:
If we divide 4540 by 646, we get 7 and a remainder of 18.
The next digit of our result is 7. 
Result so far: 119907.517
Deduct 4522 from 4540 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:
If we divide 180 by 646, we get 0 and a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 119907.517
If we take 0 away from 180, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 13:
When dividing 1800 by 646, we get 2 with a remainder of 508.
The number 2 becomes the next digit in our result. 
Result so far: 119907.51702
Subtract 1292 from 1800 to get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

On to step 14:
The number 646 fits into 5080 7 times, leaving a remainder of 558.
Put 7 as the next digit of the answer. 
Result so far: 119907.517027
Subtracting 4522 from 5080 leaves us with 558.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

Moving on to step 15:
5580 divided by 646 is 8 with a remainder of 412.
The next digit of our result is 8. 
Result so far: 119907.5170278
The remainder is 412 after subtracting 5168 from 5580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Advancing to step 16:
646 can be fit into 4120 6 times, resulting in a remainder of 244.
The number 6 becomes the next digit in our result. 
Result so far: 119907.51702786
The remainder is 244 after subtracting 3876 from 4120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

In conclusion, the division gives 119907.51702786 with a balance of 2.44e-07.