54985871 ÷ 3 
We want to figure out the number of times 54985871 can be divided by 3.

Moving on to step 1:
The number 3 fits into 5 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 3 from 5 leaves us with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 3

Let's proceed to step 2:
24 divided by 3 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 18.0
The remainder is 0 after subtracting 24 from 24.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 3

Moving on to step 3:
If we divide 9 by 3, we get 3 and a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 183.0
Subtract 9 from 9 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 3

Going ahead to step 4:
When dividing 8 by 3, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 1832.0
Subtracting 6 from 8 leaves us with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 3

Going ahead to step 5:
The number 3 fits into 25 8 times, leaving a remainder of 1.
The next digit of our result is 8. 
Result so far: 18328.0
Deduct 24 from 25 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 3

On to step 6:
When dividing 18 by 3, we get 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 183286.0
Deduct 18 from 18 and we're left with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 3

Let's proceed to step 7:
If we divide 7 by 3, we get 2 and a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 1832862.0
The remainder is 1 after subtracting 6 from 7.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 3

Advancing to step 8:
3 goes into 11 3 times with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 18328623.0
If we take 9 away from 11, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
If we divide 20 by 3, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 18328623.6
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 3 fits into 20 6 times, leaving a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 18328623.66
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 18328623.66 with a remaining 0.002.