666430 ÷ 85 
We want to divide 666430 by 85.

Let's proceed to step 1:
If we divide 6 by 85, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 85

Let's proceed to step 2:
The number 85 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Include the next digit (6) from the dividend after 66, then repeat: 666 / 85

On to step 3:
When dividing 666 by 85, we get 7 with a remainder of 71.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 595 from 666 leaves us with 71.
Include the next digit (4) from the dividend after 71, then repeat: 714 / 85

Going ahead to step 4:
85 can be fit into 714 8 times, resulting in a remainder of 34.
Use 8 as the next digit of our solution. 
Result so far: 78.0
Subtract 680 from 714 to get 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 85

On to step 5:
85 can be fit into 343 4 times, resulting in a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 784.0
Subtracting 340 from 343 leaves us with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 85

Step 6:
85 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 7840.0
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
If we divide 300 by 85, we get 3 and a remainder of 45.
Put 3 as the next digit of the answer. 
Result so far: 7840.3
Deduct 255 from 300 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 8:
If we divide 450 by 85, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7840.35
Subtracting 425 from 450 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.

Moving on to step 9:
If we divide 250 by 85, we get 2 and a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 7840.352
The remainder is 80 after subtracting 170 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 10:
If we divide 800 by 85, we get 9 and a remainder of 35.
The next digit of our result is 9. 
Result so far: 7840.3529
Subtract 765 from 800 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
85 goes into 350 4 times with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 7840.35294
If we subtract 340 from 350, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
85 goes into 100 1 times with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 7840.352941
The remainder is 15 after subtracting 85 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 13:
150 divided by 85 is 1 with a remainder of 65.
The next digit of our result is 1. 
Result so far: 7840.3529411
Subtract 85 from 150 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The quotient of the division is 7840.3529411, and the remainder is 6.5e-07.