We're dividing 351598 by 40 
Our goal is to divide 351598 by 40.

Moving on to step 1:
If we divide 3 by 40, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 40

Advancing to step 2:
The number 40 fits into 35 0 times, leaving a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Grab the next digit (1) from the dividend, add it to 35, then carry on: 351 / 40

Going ahead to step 3:
40 goes into 351 8 times with a remainder of 31.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 31 after subtracting 320 from 351.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 40

Step 4:
When dividing 315 by 40, we get 7 with a remainder of 35.
Record the quotient 7 as the next digit in the result. 
Result so far: 87.0
If we take 280 away from 315, we end up with 35.
Take the next digit (9) from the dividend and append it to 35, then repeat: 359 / 40

Advancing to step 5:
40 goes into 359 8 times with a remainder of 39.
The next digit of our result is 8. 
Result so far: 878.0
Deduct 320 from 359 and we're left with 39.
Append the next digit (8) from the dividend to 39 and continue with: 398 / 40

Let's proceed to step 6:
When dividing 398 by 40, we get 9 with a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 8789.0
Subtract 360 from 398 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 7:
380 divided by 40 is 9 with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 8789.9
Subtract 360 from 380 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
If we divide 200 by 40, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 8789.95
Subtracting 200 from 200 leaves us 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.

Moving on to step 9:
If we divide 0 by 40, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 8789.95
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.

Going ahead to step 10:
0 divided by 40 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8789.95
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 outcome is 8789.95, with a leftover of 0.0.