84399379 divided by 680 
Our goal is to divide 84399379 by 680.

On to step 1:
The number 680 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 680

Going ahead to step 2:
680 can be fit into 84 0 times, resulting in a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 84 and we're left with 84.
Take the next digit (3) from the dividend and append it to 84, then repeat: 843 / 680

Going ahead to step 3:
When dividing 843 by 680, we get 1 with a remainder of 163.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 680 from 843 to get 163.
Append the next digit (9) from the dividend to 163 and continue with: 1639 / 680

Moving on to step 4:
680 can be fit into 1639 2 times, resulting in a remainder of 279.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 1360 from 1639 leaves us with 279.
Fetch the next digit (9) from the dividend, attach it to 279 and continue: 2799 / 680

Going ahead to step 5:
680 goes into 2799 4 times with a remainder of 79.
Write down 4 as next digit of the result. 
Result so far: 124.0
Subtracting 2720 from 2799 leaves us with 79.
Fetch the next digit (3) from the dividend, attach it to 79 and continue: 793 / 680

Going ahead to step 6:
When dividing 793 by 680, we get 1 with a remainder of 113.
Put 1 as the next digit of the answer. 
Result so far: 1241.0
If we subtract 680 from 793, we get 113.
Fetch the next digit (7) from the dividend, attach it to 113 and continue: 1137 / 680

Advancing to step 7:
1137 divided by 680 is 1 with a remainder of 457.
Record the quotient 1 as the next digit in the result. 
Result so far: 12411.0
Subtract 680 from 1137 to get 457.
Include the next digit (9) from the dividend after 457, then repeat: 4579 / 680

Going ahead to step 8:
When dividing 4579 by 680, we get 6 with a remainder of 499.
Put 6 as the next digit of the answer. 
Result so far: 124116.0
Subtract 4080 from 4579 to get 499.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4990, and continue the process.

Going ahead to step 9:
4990 divided by 680 is 7 with a remainder of 230.
Put 7 as the next digit of the answer. 
Result so far: 124116.7
The remainder is 230 after subtracting 4760 from 4990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 10:
680 can be fit into 2300 3 times, resulting in a remainder of 260.
The number 3 becomes the next digit in our result. 
Result so far: 124116.73
Subtracting 2040 from 2300 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 11:
2600 divided by 680 is 3 with a remainder of 560.
Record the quotient 3 as the next digit in the result. 
Result so far: 124116.733
If we take 2040 away from 2600, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

The final result is 124116.733 with a remainder of 0.056.