603905 ÷ 86 
Our goal is to divide 603905 by 86.

Let's proceed to step 1:
The number 86 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 86

Step 2:
86 can be fit into 60 0 times, resulting in a remainder of 60.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 60 after subtracting 0 from 60.
Append the next digit (3) from the dividend to 60 and continue with: 603 / 86

Let's proceed to step 3:
86 can be fit into 603 7 times, resulting in a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 1 after subtracting 602 from 603.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 86

Let's proceed to step 4:
When dividing 19 by 86, we get 0 with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 70.0
Deduct 0 from 19 and we're left with 19.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 86

Moving on to step 5:
86 can be fit into 190 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 702.0
Deduct 172 from 190 and we're left with 18.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 86

On to step 6:
The number 86 fits into 185 2 times, leaving a remainder of 13.
Use 2 as the next digit of our solution. 
Result so far: 7022.0
If we take 172 away from 185, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
86 can be fit into 130 1 times, resulting in a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 7022.1
Subtracting 86 from 130 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 8:
86 can be fit into 440 5 times, resulting in a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 7022.15
Subtract 430 from 440 to 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.

Going ahead to step 9:
If we divide 100 by 86, we get 1 and a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 7022.151
The remainder is 14 after subtracting 86 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
The number 86 fits into 140 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 7022.1511
If we subtract 86 from 140, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 7022.1511 with a remainder of 0.00054.