We're dividing 668354 by 86 
We want to divide 668354 by 86.

Let's proceed to step 1:
If we divide 6 by 86, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 86

Step 2:
If we divide 66 by 86, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (8) from the dividend, add it to 66, then carry on: 668 / 86

On to step 3:
86 can be fit into 668 7 times, resulting in a remainder of 66.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we subtract 602 from 668, we get 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 86

Moving on to step 4:
When dividing 663 by 86, we get 7 with a remainder of 61.
Put 7 as the next digit of the answer. 
Result so far: 77.0
Subtracting 602 from 663 leaves us with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 86

Step 5:
If we divide 615 by 86, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 777.0
The remainder is 13 after subtracting 602 from 615.
Append the next digit (4) from the dividend to 13 and continue with: 134 / 86

Advancing to step 6:
If we divide 134 by 86, we get 1 and a remainder of 48.
Write down 1 as next digit of the result. 
Result so far: 7771.0
Subtract 86 from 134 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 7:
If we divide 480 by 86, we get 5 and a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 7771.5
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 8:
86 goes into 500 5 times with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 7771.55
Deduct 430 from 500 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 7771.55, and the remainder is 0.07.