63990583 ÷ 165 
Let's see how many times 165 fits into 63990583.

Going ahead to step 1:
When dividing 6 by 165, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 165

Going ahead to step 2:
The number 165 fits into 63 0 times, leaving a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 165

Let's proceed to step 3:
The number 165 fits into 639 3 times, leaving a remainder of 144.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 495 from 639 leaves us with 144.
Fetch the next digit (9) from the dividend, attach it to 144 and continue: 1449 / 165

Moving on to step 4:
When dividing 1449 by 165, we get 8 with a remainder of 129.
Write down 8 as next digit of the result. 
Result so far: 38.0
Subtracting 1320 from 1449 leaves us with 129.
Fetch the next digit (0) from the dividend, attach it to 129 and continue: 1290 / 165

Step 5:
If we divide 1290 by 165, we get 7 and a remainder of 135.
The number 7 becomes the next digit in our result. 
Result so far: 387.0
If we subtract 1155 from 1290, we get 135.
Include the next digit (5) from the dividend after 135, then repeat: 1355 / 165

Let's proceed to step 6:
If we divide 1355 by 165, we get 8 and a remainder of 35.
Write down 8 as next digit of the result. 
Result so far: 3878.0
If we subtract 1320 from 1355, we get 35.
Fetch the next digit (8) from the dividend, attach it to 35 and continue: 358 / 165

Going ahead to step 7:
165 can be fit into 358 2 times, resulting in a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 38782.0
The remainder is 28 after subtracting 330 from 358.
Fetch the next digit (3) from the dividend, attach it to 28 and continue: 283 / 165

Advancing to step 8:
165 can be fit into 283 1 times, resulting in a remainder of 118.
Record the quotient 1 as the next digit in the result. 
Result so far: 387821.0
If we take 165 away from 283, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 9:
The number 165 fits into 1180 7 times, leaving a remainder of 25.
Write down 7 as next digit of the result. 
Result so far: 387821.7
Deduct 1155 from 1180 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 10:
165 can be fit into 250 1 times, resulting in a remainder of 85.
Put 1 as the next digit of the answer. 
Result so far: 387821.71
If we subtract 165 from 250, we get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Moving on to step 11:
When dividing 850 by 165, we get 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 387821.715
Subtract 825 from 850 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 12:
The number 165 fits into 250 1 times, leaving a remainder of 85.
Write down 1 as next digit of the result. 
Result so far: 387821.7151
The remainder is 85 after subtracting 165 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Moving on to step 13:
The number 165 fits into 850 5 times, leaving a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 387821.71515
Deduct 825 from 850 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 14:
165 can be fit into 250 1 times, resulting in a remainder of 85.
Write down 1 as next digit of the result. 
Result so far: 387821.715151
The remainder is 85 after subtracting 165 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Advancing to step 15:
165 goes into 850 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 387821.7151515
Deduct 825 from 850 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 16:
165 can be fit into 250 1 times, resulting in a remainder of 85.
The next digit of our result is 1. 
Result so far: 387821.71515151
Subtracting 165 from 250 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

The final outcome is 387821.71515151, with a leftover of 8.5e-08.