79928849 ÷ 643 
We want to figure out the number of times 79928849 can be divided by 643.

Going ahead to step 1:
7 divided by 643 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 643

Let's proceed 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
The remainder is 79 after subtracting 0 from 79.
Bring next digit (9) of the dividend behind the 79 and repeat the process: 799 / 643

Let's proceed to step 3:
When dividing 799 by 643, we get 1 with a remainder of 156.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 643 from 799 to get 156.
Fetch the next digit (2) from the dividend, attach it to 156 and continue: 1562 / 643

Step 4:
643 can be fit into 1562 2 times, resulting in a remainder of 276.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 1286 from 1562 leaves us with 276.
Fetch the next digit (8) from the dividend, attach it to 276 and continue: 2768 / 643

Going ahead to step 5:
643 goes into 2768 4 times with a remainder of 196.
Use 4 as the next digit of our solution. 
Result so far: 124.0
The remainder is 196 after subtracting 2572 from 2768.
Fetch the next digit (8) from the dividend, attach it to 196 and continue: 1968 / 643

Advancing to step 6:
If we divide 1968 by 643, we get 3 and a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 1243.0
If we subtract 1929 from 1968, we get 39.
Include the next digit (4) from the dividend after 39, then repeat: 394 / 643

Moving on to step 7:
When dividing 394 by 643, we get 0 with a remainder of 394.
Put 0 as the next digit of the answer. 
Result so far: 12430.0
Subtracting 0 from 394 leaves us with 394.
Bring next digit (9) of the dividend behind the 394 and repeat the process: 3949 / 643

Step 8:
The number 643 fits into 3949 6 times, leaving a remainder of 91.
The number 6 becomes the next digit in our result. 
Result so far: 124306.0
The remainder is 91 after subtracting 3858 from 3949.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 9:
910 divided by 643 is 1 with a remainder of 267.
Put 1 as the next digit of the answer. 
Result so far: 124306.1
Deduct 643 from 910 and we're left with 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Advancing to step 10:
643 goes into 2670 4 times with a remainder of 98.
Record the quotient 4 as the next digit in the result. 
Result so far: 124306.14
If we subtract 2572 from 2670, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 11:
643 can be fit into 980 1 times, resulting in a remainder of 337.
Record the quotient 1 as the next digit in the result. 
Result so far: 124306.141
The remainder is 337 after subtracting 643 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Going ahead to step 12:
3370 divided by 643 is 5 with a remainder of 155.
Write down 5 as next digit of the result. 
Result so far: 124306.1415
If we take 3215 away from 3370, we end up with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 13:
643 goes into 1550 2 times with a remainder of 264.
Record the quotient 2 as the next digit in the result. 
Result so far: 124306.14152
Subtract 1286 from 1550 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Going ahead to step 14:
The number 643 fits into 2640 4 times, leaving a remainder of 68.
The next digit of our result is 4. 
Result so far: 124306.141524
If we subtract 2572 from 2640, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 15:
643 can be fit into 680 1 times, resulting in a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 124306.1415241
The remainder is 37 after subtracting 643 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 16:
643 can be fit into 370 0 times, resulting in a remainder of 370.
Write down 0 as next digit of the result. 
Result so far: 124306.1415241
The remainder is 370 after subtracting 0 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

After the division, we end up with 124306.1415241 and a remainder of 3.7e-07.