We look at the division of 64200 by 90 
We want to divide 64200 by 90.

Going ahead to step 1:
The number 90 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 90

Moving on to step 2:
90 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Include the next digit (2) from the dividend after 64, then repeat: 642 / 90

Moving on to step 3:
If we divide 642 by 90, we get 7 and a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 630 from 642 leaves us with 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 90

Advancing to step 4:
If we divide 120 by 90, we get 1 and a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 71.0
Deduct 90 from 120 and we're left with 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 90

Moving on to step 5:
If we divide 300 by 90, we get 3 and a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 713.0
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 6:
300 divided by 90 is 3 with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 713.3
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
The number 90 fits into 300 3 times, leaving a remainder of 30.
The next digit of our result is 3. 
Result so far: 713.33
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 713.33, with a leftover of 0.03.