We're dividing 79786577 by 643 
We want to divide 79786577 by 643.

Going ahead to step 1:
When dividing 7 by 643, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 643

Advancing to step 2:
If we divide 79 by 643, we get 0 and a remainder of 79.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Bring next digit (7) of the dividend behind the 79 and repeat the process: 797 / 643

Let's proceed to step 3:
When dividing 797 by 643, we get 1 with a remainder of 154.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 643 away from 797, we end up with 154.
Append the next digit (8) from the dividend to 154 and continue with: 1548 / 643

Advancing to step 4:
If we divide 1548 by 643, we get 2 and a remainder of 262.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 1286 from 1548 to get 262.
Append the next digit (6) from the dividend to 262 and continue with: 2626 / 643

Advancing to step 5:
643 goes into 2626 4 times with a remainder of 54.
Use 4 as the next digit of our solution. 
Result so far: 124.0
Subtracting 2572 from 2626 leaves us with 54.
Grab the next digit (5) from the dividend, add it to 54, then carry on: 545 / 643

On to step 6:
If we divide 545 by 643, we get 0 and a remainder of 545.
Put 0 as the next digit of the answer. 
Result so far: 1240.0
If we subtract 0 from 545, we get 545.
Take the next digit (7) from the dividend and append it to 545, then repeat: 5457 / 643

On to step 7:
If we divide 5457 by 643, we get 8 and a remainder of 313.
Record the quotient 8 as the next digit in the result. 
Result so far: 12408.0
The remainder is 313 after subtracting 5144 from 5457.
Include the next digit (7) from the dividend after 313, then repeat: 3137 / 643

Advancing to step 8:
643 goes into 3137 4 times with a remainder of 565.
Write down 4 as next digit of the result. 
Result so far: 124084.0
If we subtract 2572 from 3137, we get 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Moving on to step 9:
When dividing 5650 by 643, we get 8 with a remainder of 506.
Write down 8 as next digit of the result. 
Result so far: 124084.8
If we subtract 5144 from 5650, we get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Moving on to step 10:
If we divide 5060 by 643, we get 7 and a remainder of 559.
The number 7 becomes the next digit in our result. 
Result so far: 124084.87
Subtracting 4501 from 5060 leaves us with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

On to step 11:
When dividing 5590 by 643, we get 8 with a remainder of 446.
Record the quotient 8 as the next digit in the result. 
Result so far: 124084.878
The remainder is 446 after subtracting 5144 from 5590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

On to step 12:
643 goes into 4460 6 times with a remainder of 602.
The next digit of our result is 6. 
Result so far: 124084.8786
Deduct 3858 from 4460 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.

On to step 13:
The number 643 fits into 6020 9 times, leaving a remainder of 233.
Put 9 as the next digit of the answer. 
Result so far: 124084.87869
The remainder is 233 after subtracting 5787 from 6020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Advancing to step 14:
643 can be fit into 2330 3 times, resulting in a remainder of 401.
Record the quotient 3 as the next digit in the result. 
Result so far: 124084.878693
If we take 1929 away from 2330, we end up with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Let's proceed to step 15:
The number 643 fits into 4010 6 times, leaving a remainder of 152.
Put 6 as the next digit of the answer. 
Result so far: 124084.8786936
The remainder is 152 after subtracting 3858 from 4010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 16:
When dividing 1520 by 643, we get 2 with a remainder of 234.
The next digit of our result is 2. 
Result so far: 124084.87869362
Deduct 1286 from 1520 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

The final result is 124084.87869362 with a remainder of 2.34e-07.