We divide 686161 by 40
We want to divide 686161 by 40.

Going ahead to step 1:
The number 40 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.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 40

Let's proceed to step 2:
68 divided by 40 is 1 with a remainder of 28.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 40 from 68 to get 28.
Fetch the next digit (6) from the dividend, attach it to 28 and continue: 286 / 40

Step 3:
The number 40 fits into 286 7 times, leaving a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 280 from 286, we get 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 40

Moving on to step 4:
61 divided by 40 is 1 with a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 171.0
The remainder is 21 after subtracting 40 from 61.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 40

Step 5:
40 can be fit into 216 5 times, resulting in a remainder of 16.
The next digit of our result is 5. 
Result so far: 1715.0
Deduct 200 from 216 and we're left with 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 40

Advancing to step 6:
If we divide 161 by 40, we get 4 and a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 17154.0
If we take 160 away from 161, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
10 divided by 40 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 17154.0
Deduct 0 from 10 and we're left 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.

Advancing to step 8:
40 goes into 100 2 times with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 17154.02
Deduct 80 from 100 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
When dividing 200 by 40, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 17154.025
If we take 200 away from 200, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
0 divided by 40 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 17154.025
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 11:
The number 40 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 17154.025
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 17154.025 with a remainder of 0.0.