We're dividing 669343 by 78 
We want to divide 669343 by 78.

Step 1:
78 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 78

Going ahead to step 2:
The number 78 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 78

Moving on to step 3:
The number 78 fits into 669 8 times, leaving a remainder of 45.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 624 from 669 leaves us with 45.
Grab the next digit (3) from the dividend, add it to 45, then carry on: 453 / 78

Advancing to step 4:
78 can be fit into 453 5 times, resulting in a remainder of 63.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
Deduct 390 from 453 and we're left with 63.
Bring next digit (4) of the dividend behind the 63 and repeat the process: 634 / 78

Going ahead to step 5:
The number 78 fits into 634 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 858.0
Deduct 624 from 634 and we're left with 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 78

Let's proceed to step 6:
103 divided by 78 is 1 with a remainder of 25.
Record the quotient 1 as the next digit in the result. 
Result so far: 8581.0
Subtracting 78 from 103 leaves us 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.

Let's proceed to step 7:
250 divided by 78 is 3 with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 8581.3
Subtracting 234 from 250 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
78 goes into 160 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 8581.32
If we subtract 156 from 160, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
The number 78 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 8581.32
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
400 divided by 78 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 8581.3205
If we take 390 away from 400, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
78 goes into 100 1 times with a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 8581.32051
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 12:
220 divided by 78 is 2 with a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 8581.320512
Subtract 156 from 220 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 13:
When dividing 640 by 78, we get 8 with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 8581.3205128
Subtract 624 from 640 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
78 goes into 160 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 8581.32051282
If we subtract 156 from 160, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 8581.32051282 with a remainder of 4e-09.