103998 ÷ 3 
We want to figure out the number of times 103998 can be divided by 3.

On to step 1:
If we divide 1 by 3, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 3

On to step 2:
If we divide 10 by 3, we get 3 and a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 9 from 10 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Moving on to step 3:
If we divide 13 by 3, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 34.0
If we subtract 12 from 13, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 3

Step 4:
When dividing 19 by 3, we get 6 with a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 346.0
Deduct 18 from 19 and we're left with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 3

On to step 5:
3 goes into 19 6 times with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 3466.0
The remainder is 1 after subtracting 18 from 19.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 3

On to step 6:
The number 3 fits into 18 6 times, leaving a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 34666.0
Subtract 18 from 18 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 7:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 34666.0
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.

Moving on to step 8:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 34666.0
Subtract 0 from 0 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.

The final outcome is 34666.0, with a leftover of 0.0.