We divide 644836 by 78
We're looking to find how many times 78 goes into 644836.

Moving on to step 1:
6 divided by 78 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 78

Going ahead to step 2:
The number 78 fits into 64 0 times, leaving a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 78

Advancing to step 3:
If we divide 644 by 78, we get 8 and a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 624 from 644 to get 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 78

On to step 4:
208 divided by 78 is 2 with a remainder of 52.
The next digit of our result is 2. 
Result so far: 82.0
If we take 156 away from 208, we end up with 52.
Append the next digit (3) from the dividend to 52 and continue with: 523 / 78

Going ahead to step 5:
78 can be fit into 523 6 times, resulting in a remainder of 55.
The number 6 becomes the next digit in our result. 
Result so far: 826.0
The remainder is 55 after subtracting 468 from 523.
Take the next digit (6) from the dividend and append it to 55, then repeat: 556 / 78

Advancing to step 6:
When dividing 556 by 78, we get 7 with a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 8267.0
Subtracting 546 from 556 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
100 divided by 78 is 1 with a remainder of 22.
Use 1 as the next digit of our solution. 
Result so far: 8267.1
Subtract 78 from 100 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 8:
The number 78 fits into 220 2 times, leaving a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 8267.12
If we take 156 away from 220, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
78 can be fit into 640 8 times, resulting in a remainder of 16.
The next digit of our result is 8. 
Result so far: 8267.128
Subtract 624 from 640 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 10:
When dividing 160 by 78, we get 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 8267.1282
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 11:
78 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 8267.1282
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 12:
When dividing 400 by 78, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 8267.128205
If we subtract 390 from 400, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
When dividing 100 by 78, we get 1 with a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 8267.1282051
Subtract 78 from 100 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
220 divided by 78 is 2 with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 8267.12820512
Deduct 156 from 220 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

After the division, we end up with 8267.12820512 and a remainder of 6.4e-08.