678400 ÷ 79 
We're looking to find how many times 79 goes into 678400.

Step 1:
79 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 79

Moving on to step 2:
If we divide 67 by 79, we get 0 and a remainder of 67.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 67 and we're left with 67.
Append the next digit (8) from the dividend to 67 and continue with: 678 / 79

Moving on to step 3:
When dividing 678 by 79, we get 8 with a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 632 away from 678, we end up with 46.
Fetch the next digit (4) from the dividend, attach it to 46 and continue: 464 / 79

On to step 4:
If we divide 464 by 79, we get 5 and a remainder of 69.
Put 5 as the next digit of the answer. 
Result so far: 85.0
Subtract 395 from 464 to get 69.
Bring next digit (0) of the dividend behind the 69 and repeat the process: 690 / 79

Let's proceed to step 5:
690 divided by 79 is 8 with a remainder of 58.
Record the quotient 8 as the next digit in the result. 
Result so far: 858.0
Subtracting 632 from 690 leaves us with 58.
Fetch the next digit (0) from the dividend, attach it to 58 and continue: 580 / 79

Moving on to step 6:
The number 79 fits into 580 7 times, leaving a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 8587.0
The remainder is 27 after subtracting 553 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 7:
79 goes into 270 3 times with a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 8587.3
The remainder is 33 after subtracting 237 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 8:
330 divided by 79 is 4 with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 8587.34
Subtracting 316 from 330 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
When dividing 140 by 79, we get 1 with a remainder of 61.
Write down 1 as next digit of the result. 
Result so far: 8587.341
If we subtract 79 from 140, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 10:
When dividing 610 by 79, we get 7 with a remainder of 57.
Use 7 as the next digit of our solution. 
Result so far: 8587.3417
If we take 553 away from 610, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 11:
When dividing 570 by 79, we get 7 with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 8587.34177
If we subtract 553 from 570, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 8587.34177, with a leftover of 1.7e-05.