Let's divide 79810770 by 643
Our goal is to divide 79810770 by 643.

Advancing to step 1:
643 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 643

Moving on to step 2:
If we divide 79 by 643, we get 0 and a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Bring next digit (8) of the dividend behind the 79 and repeat the process: 798 / 643

Advancing to step 3:
If we divide 798 by 643, we get 1 and a remainder of 155.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 155 after subtracting 643 from 798.
Append the next digit (1) from the dividend to 155 and continue with: 1551 / 643

Let's proceed to step 4:
1551 divided by 643 is 2 with a remainder of 265.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 1286 from 1551 and we're left with 265.
Fetch the next digit (0) from the dividend, attach it to 265 and continue: 2650 / 643

Advancing to step 5:
The number 643 fits into 2650 4 times, leaving a remainder of 78.
Write down 4 as next digit of the result. 
Result so far: 124.0
Subtract 2572 from 2650 to get 78.
Include the next digit (7) from the dividend after 78, then repeat: 787 / 643

Let's proceed to step 6:
The number 643 fits into 787 1 times, leaving a remainder of 144.
The next digit of our result is 1. 
Result so far: 1241.0
The remainder is 144 after subtracting 643 from 787.
Fetch the next digit (7) from the dividend, attach it to 144 and continue: 1447 / 643

Advancing to step 7:
If we divide 1447 by 643, we get 2 and a remainder of 161.
The number 2 becomes the next digit in our result. 
Result so far: 12412.0
If we take 1286 away from 1447, we end up with 161.
Fetch the next digit (0) from the dividend, attach it to 161 and continue: 1610 / 643

Step 8:
1610 divided by 643 is 2 with a remainder of 324.
Write down 2 as next digit of the result. 
Result so far: 124122.0
If we take 1286 away from 1610, we end up with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Moving on to step 9:
If we divide 3240 by 643, we get 5 and a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 124122.5
Deduct 3215 from 3240 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.

Advancing to step 10:
The number 643 fits into 250 0 times, leaving a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 124122.5
Subtracting 0 from 250 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 11:
When dividing 2500 by 643, we get 3 with a remainder of 571.
Write down 3 as next digit of the result. 
Result so far: 124122.503
The remainder is 571 after subtracting 1929 from 2500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5710, and continue the process.

Let's proceed to step 12:
The number 643 fits into 5710 8 times, leaving a remainder of 566.
The number 8 becomes the next digit in our result. 
Result so far: 124122.5038
Subtracting 5144 from 5710 leaves us with 566.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5660, and continue the process.

Moving on to step 13:
The number 643 fits into 5660 8 times, leaving a remainder of 516.
Use 8 as the next digit of our solution. 
Result so far: 124122.50388
If we subtract 5144 from 5660, we get 516.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5160, and continue the process.

The final result is 124122.50388 with a remainder of 0.000516.