We're dividing 640402 by 86 
We want to divide 640402 by 86.

Let's proceed to step 1:
If we divide 6 by 86, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 86

Step 2:
86 goes into 64 0 times with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Fetch the next digit (0) from the dividend, attach it to 64 and continue: 640 / 86

Step 3:
If we divide 640 by 86, we get 7 and a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 602 from 640 leaves us with 38.
Append the next digit (4) from the dividend to 38 and continue with: 384 / 86

On to step 4:
384 divided by 86 is 4 with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
Subtract 344 from 384 to get 40.
Grab the next digit (0) from the dividend, add it to 40, then carry on: 400 / 86

Moving on to step 5:
400 divided by 86 is 4 with a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 744.0
Subtracting 344 from 400 leaves us with 56.
Grab the next digit (2) from the dividend, add it to 56, then carry on: 562 / 86

On to step 6:
562 divided by 86 is 6 with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 7446.0
The remainder is 46 after subtracting 516 from 562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 7:
86 goes into 460 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 7446.5
Subtract 430 from 460 to 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.

Step 8:
86 goes into 300 3 times with a remainder of 42.
The next digit of our result is 3. 
Result so far: 7446.53
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 9:
The number 86 fits into 420 4 times, leaving a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 7446.534
If we take 344 away from 420, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 10:
86 goes into 760 8 times with a remainder of 72.
Record the quotient 8 as the next digit in the result. 
Result so far: 7446.5348
If we take 688 away from 760, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 11:
720 divided by 86 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 7446.53488
If we subtract 688 from 720, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 7446.53488, with a leftover of 3.2e-05.