81543989 divided by 600 
Let's see how many times 600 fits into 81543989.

Advancing to step 1:
When dividing 8 by 600, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 600

Moving on to step 2:
600 goes into 81 0 times with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Append the next digit (5) from the dividend to 81 and continue with: 815 / 600

Advancing to step 3:
815 divided by 600 is 1 with a remainder of 215.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 600 from 815 to get 215.
Fetch the next digit (4) from the dividend, attach it to 215 and continue: 2154 / 600

Going ahead to step 4:
600 goes into 2154 3 times with a remainder of 354.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtracting 1800 from 2154 leaves us with 354.
Fetch the next digit (3) from the dividend, attach it to 354 and continue: 3543 / 600

Advancing to step 5:
600 goes into 3543 5 times with a remainder of 543.
Record the quotient 5 as the next digit in the result. 
Result so far: 135.0
The remainder is 543 after subtracting 3000 from 3543.
Grab the next digit (9) from the dividend, add it to 543, then carry on: 5439 / 600

Advancing to step 6:
5439 divided by 600 is 9 with a remainder of 39.
Write down 9 as next digit of the result. 
Result so far: 1359.0
If we take 5400 away from 5439, we end up with 39.
Grab the next digit (8) from the dividend, add it to 39, then carry on: 398 / 600

Going ahead to step 7:
600 goes into 398 0 times with a remainder of 398.
Record the quotient 0 as the next digit in the result. 
Result so far: 13590.0
Deduct 0 from 398 and we're left with 398.
Take the next digit (9) from the dividend and append it to 398, then repeat: 3989 / 600

On to step 8:
3989 divided by 600 is 6 with a remainder of 389.
The next digit of our result is 6. 
Result so far: 135906.0
The remainder is 389 after subtracting 3600 from 3989.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Let's proceed to step 9:
3890 divided by 600 is 6 with a remainder of 290.
Put 6 as the next digit of the answer. 
Result so far: 135906.6
Subtract 3600 from 3890 to get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 10:
When dividing 2900 by 600, we get 4 with a remainder of 500.
The next digit of our result is 4. 
Result so far: 135906.64
Deduct 2400 from 2900 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 11:
5000 divided by 600 is 8 with a remainder of 200.
Record the quotient 8 as the next digit in the result. 
Result so far: 135906.648
Subtracting 4800 from 5000 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
The number 600 fits into 2000 3 times, leaving a remainder of 200.
Put 3 as the next digit of the answer. 
Result so far: 135906.6483
Subtract 1800 from 2000 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 13:
600 can be fit into 2000 3 times, resulting in a remainder of 200.
Put 3 as the next digit of the answer. 
Result so far: 135906.64833
The remainder is 200 after subtracting 1800 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 135906.64833 and a remainder of 0.0002.