18121506 divided by 998 
We want to figure out the number of times 18121506 can be divided by 998.

Let's proceed to step 1:
1 divided by 998 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 998

Moving on to step 2:
998 can be fit into 18 0 times, resulting in a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 998

On to step 3:
If we divide 181 by 998, we get 0 and a remainder of 181.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 181 and we're left with 181.
Append the next digit (2) from the dividend to 181 and continue with: 1812 / 998

Step 4:
998 goes into 1812 1 times with a remainder of 814.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 998 away from 1812, we end up with 814.
Grab the next digit (1) from the dividend, add it to 814, then carry on: 8141 / 998

On to step 5:
When dividing 8141 by 998, we get 8 with a remainder of 157.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtracting 7984 from 8141 leaves us with 157.
Append the next digit (5) from the dividend to 157 and continue with: 1575 / 998

Moving on to step 6:
The number 998 fits into 1575 1 times, leaving a remainder of 577.
Record the quotient 1 as the next digit in the result. 
Result so far: 181.0
If we take 998 away from 1575, we end up with 577.
Fetch the next digit (0) from the dividend, attach it to 577 and continue: 5770 / 998

Advancing to step 7:
998 goes into 5770 5 times with a remainder of 780.
Put 5 as the next digit of the answer. 
Result so far: 1815.0
If we subtract 4990 from 5770, we get 780.
Include the next digit (6) from the dividend after 780, then repeat: 7806 / 998

On to step 8:
7806 divided by 998 is 7 with a remainder of 820.
The next digit of our result is 7. 
Result so far: 18157.0
Deduct 6986 from 7806 and we're left with 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

Step 9:
When dividing 8200 by 998, we get 8 with a remainder of 216.
Write down 8 as next digit of the result. 
Result so far: 18157.8
If we subtract 7984 from 8200, we get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Advancing to step 10:
998 goes into 2160 2 times with a remainder of 164.
The number 2 becomes the next digit in our result. 
Result so far: 18157.82
If we subtract 1996 from 2160, we get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Moving on to step 11:
998 can be fit into 1640 1 times, resulting in a remainder of 642.
The number 1 becomes the next digit in our result. 
Result so far: 18157.821
If we take 998 away from 1640, we end up with 642.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

Going ahead to step 12:
6420 divided by 998 is 6 with a remainder of 432.
The number 6 becomes the next digit in our result. 
Result so far: 18157.8216
The remainder is 432 after subtracting 5988 from 6420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Moving on to step 13:
The number 998 fits into 4320 4 times, leaving a remainder of 328.
Record the quotient 4 as the next digit in the result. 
Result so far: 18157.82164
If we subtract 3992 from 4320, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Advancing to step 14:
When dividing 3280 by 998, we get 3 with a remainder of 286.
Write down 3 as next digit of the result. 
Result so far: 18157.821643
If we subtract 2994 from 3280, we get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Step 15:
When dividing 2860 by 998, we get 2 with a remainder of 864.
The next digit of our result is 2. 
Result so far: 18157.8216432
If we subtract 1996 from 2860, we get 864.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8640, and continue the process.

Moving on to step 16:
998 goes into 8640 8 times with a remainder of 656.
Use 8 as the next digit of our solution. 
Result so far: 18157.82164328
The remainder is 656 after subtracting 7984 from 8640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

In conclusion, the division gives 18157.82164328 with a balance of 6.56e-07.