We divide 54261673 by 999
We want to figure out the number of times 54261673 can be divided by 999.

Moving on to step 1:
If we divide 5 by 999, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 999

Advancing to step 2:
If we divide 54 by 999, we get 0 and a remainder of 54.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 54 to get 54.
Grab the next digit (2) from the dividend, add it to 54, then carry on: 542 / 999

On to step 3:
When dividing 542 by 999, we get 0 with a remainder of 542.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 542, we end up with 542.
Append the next digit (6) from the dividend to 542 and continue with: 5426 / 999

Going ahead to step 4:
999 can be fit into 5426 5 times, resulting in a remainder of 431.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 4995 from 5426 leaves us with 431.
Fetch the next digit (1) from the dividend, attach it to 431 and continue: 4311 / 999

On to step 5:
999 can be fit into 4311 4 times, resulting in a remainder of 315.
Put 4 as the next digit of the answer. 
Result so far: 54.0
If we take 3996 away from 4311, we end up with 315.
Bring next digit (6) of the dividend behind the 315 and repeat the process: 3156 / 999

Step 6:
The number 999 fits into 3156 3 times, leaving a remainder of 159.
Put 3 as the next digit of the answer. 
Result so far: 543.0
If we subtract 2997 from 3156, we get 159.
Grab the next digit (7) from the dividend, add it to 159, then carry on: 1597 / 999

Moving on to step 7:
999 can be fit into 1597 1 times, resulting in a remainder of 598.
Use 1 as the next digit of our solution. 
Result so far: 5431.0
Subtracting 999 from 1597 leaves us with 598.
Append the next digit (3) from the dividend to 598 and continue with: 5983 / 999

Going ahead to step 8:
999 can be fit into 5983 5 times, resulting in a remainder of 988.
Put 5 as the next digit of the answer. 
Result so far: 54315.0
Deduct 4995 from 5983 and we're left with 988.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9880, and continue the process.

Step 9:
999 can be fit into 9880 9 times, resulting in a remainder of 889.
The number 9 becomes the next digit in our result. 
Result so far: 54315.9
Subtract 8991 from 9880 to get 889.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8890, and continue the process.

Step 10:
When dividing 8890 by 999, we get 8 with a remainder of 898.
The next digit of our result is 8. 
Result so far: 54315.98
The remainder is 898 after subtracting 7992 from 8890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8980, and continue the process.

Advancing to step 11:
8980 divided by 999 is 8 with a remainder of 988.
Put 8 as the next digit of the answer. 
Result so far: 54315.988
Subtract 7992 from 8980 to get 988.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9880, and continue the process.

The final outcome is 54315.988, with a leftover of 0.0988.