We're dividing 259413 by 40 
We want to divide 259413 by 40.

Advancing to step 1:
If we divide 2 by 40, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 40

Step 2:
40 can be fit into 25 0 times, resulting in a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 40

Advancing to step 3:
40 can be fit into 259 6 times, resulting in a remainder of 19.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 19 after subtracting 240 from 259.
Append the next digit (4) from the dividend to 19 and continue with: 194 / 40

Moving on to step 4:
40 goes into 194 4 times with a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
Subtract 160 from 194 to get 34.
Bring next digit (1) of the dividend behind the 34 and repeat the process: 341 / 40

Let's proceed to step 5:
When dividing 341 by 40, we get 8 with a remainder of 21.
The number 8 becomes the next digit in our result. 
Result so far: 648.0
The remainder is 21 after subtracting 320 from 341.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 40

Step 6:
40 goes into 213 5 times with a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 6485.0
Subtracting 200 from 213 leaves us 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.

Moving on to step 7:
40 can be fit into 130 3 times, resulting in a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 6485.3
If we take 120 away from 130, we end up 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.

On to step 8:
40 goes into 100 2 times with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 6485.32
The remainder is 20 after subtracting 80 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
40 goes into 200 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 6485.325
Subtract 200 from 200 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
40 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6485.325
Deduct 0 from 0 and we're left 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.

Let's proceed to step 11:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6485.325
If we take 0 away from 0, 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.

The final outcome is 6485.325, with a leftover of 0.0.