We're dividing 65438599 by 801 
We want to divide 65438599 by 801.

Step 1:
If we divide 6 by 801, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 801

Going ahead to step 2:
801 goes into 65 0 times with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 65, we get 65.
Fetch the next digit (4) from the dividend, attach it to 65 and continue: 654 / 801

Moving on to step 3:
If we divide 654 by 801, we get 0 and a remainder of 654.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 654, we get 654.
Fetch the next digit (3) from the dividend, attach it to 654 and continue: 6543 / 801

Advancing to step 4:
6543 divided by 801 is 8 with a remainder of 135.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 6408 from 6543, we get 135.
Fetch the next digit (8) from the dividend, attach it to 135 and continue: 1358 / 801

Advancing to step 5:
The number 801 fits into 1358 1 times, leaving a remainder of 557.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
The remainder is 557 after subtracting 801 from 1358.
Append the next digit (5) from the dividend to 557 and continue with: 5575 / 801

Going ahead to step 6:
If we divide 5575 by 801, we get 6 and a remainder of 769.
Record the quotient 6 as the next digit in the result. 
Result so far: 816.0
The remainder is 769 after subtracting 4806 from 5575.
Take the next digit (9) from the dividend and append it to 769, then repeat: 7699 / 801

Step 7:
When dividing 7699 by 801, we get 9 with a remainder of 490.
Put 9 as the next digit of the answer. 
Result so far: 8169.0
If we subtract 7209 from 7699, we get 490.
Take the next digit (9) from the dividend and append it to 490, then repeat: 4909 / 801

Going ahead to step 8:
801 goes into 4909 6 times with a remainder of 103.
Use 6 as the next digit of our solution. 
Result so far: 81696.0
Deduct 4806 from 4909 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

On to step 9:
The number 801 fits into 1030 1 times, leaving a remainder of 229.
Record the quotient 1 as the next digit in the result. 
Result so far: 81696.1
The remainder is 229 after subtracting 801 from 1030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Moving on to step 10:
When dividing 2290 by 801, we get 2 with a remainder of 688.
The next digit of our result is 2. 
Result so far: 81696.12
The remainder is 688 after subtracting 1602 from 2290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Let's proceed to step 11:
6880 divided by 801 is 8 with a remainder of 472.
The next digit of our result is 8. 
Result so far: 81696.128
Deduct 6408 from 6880 and we're left with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

On to step 12:
The number 801 fits into 4720 5 times, leaving a remainder of 715.
Write down 5 as next digit of the result. 
Result so far: 81696.1285
Deduct 4005 from 4720 and we're left with 715.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7150, and continue the process.

Advancing to step 13:
801 can be fit into 7150 8 times, resulting in a remainder of 742.
Record the quotient 8 as the next digit in the result. 
Result so far: 81696.12858
Deduct 6408 from 7150 and we're left with 742.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7420, and continue the process.

Let's proceed to step 14:
801 goes into 7420 9 times with a remainder of 211.
The next digit of our result is 9. 
Result so far: 81696.128589
If we take 7209 away from 7420, we end up with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

On to step 15:
When dividing 2110 by 801, we get 2 with a remainder of 508.
Write down 2 as next digit of the result. 
Result so far: 81696.1285892
If we take 1602 away from 2110, we end up with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Advancing to step 16:
801 goes into 5080 6 times with a remainder of 274.
Write down 6 as next digit of the result. 
Result so far: 81696.12858926
If we subtract 4806 from 5080, we get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Our division results in 81696.12858926 with a remaining 2.74e-07.