We divide 80553774 by 645
Our goal is to divide 80553774 by 645.

On to step 1:
The number 645 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 645

On to step 2:
If we divide 80 by 645, we get 0 and a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Grab the next digit (5) from the dividend, add it to 80, then carry on: 805 / 645

Moving on to step 3:
645 can be fit into 805 1 times, resulting in a remainder of 160.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 645 from 805 leaves us with 160.
Append the next digit (5) from the dividend to 160 and continue with: 1605 / 645

On to step 4:
645 goes into 1605 2 times with a remainder of 315.
The next digit of our result is 2. 
Result so far: 12.0
If we take 1290 away from 1605, we end up with 315.
Bring next digit (3) of the dividend behind the 315 and repeat the process: 3153 / 645

Advancing to step 5:
3153 divided by 645 is 4 with a remainder of 573.
Record the quotient 4 as the next digit in the result. 
Result so far: 124.0
If we subtract 2580 from 3153, we get 573.
Bring next digit (7) of the dividend behind the 573 and repeat the process: 5737 / 645

Moving on to step 6:
If we divide 5737 by 645, we get 8 and a remainder of 577.
Write down 8 as next digit of the result. 
Result so far: 1248.0
Deduct 5160 from 5737 and we're left with 577.
Fetch the next digit (7) from the dividend, attach it to 577 and continue: 5777 / 645

Moving on to step 7:
The number 645 fits into 5777 8 times, leaving a remainder of 617.
Put 8 as the next digit of the answer. 
Result so far: 12488.0
If we take 5160 away from 5777, we end up with 617.
Grab the next digit (4) from the dividend, add it to 617, then carry on: 6174 / 645

Step 8:
645 can be fit into 6174 9 times, resulting in a remainder of 369.
Use 9 as the next digit of our solution. 
Result so far: 124889.0
Subtracting 5805 from 6174 leaves us with 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Step 9:
645 can be fit into 3690 5 times, resulting in a remainder of 465.
Record the quotient 5 as the next digit in the result. 
Result so far: 124889.5
The remainder is 465 after subtracting 3225 from 3690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Step 10:
645 goes into 4650 7 times with a remainder of 135.
Put 7 as the next digit of the answer. 
Result so far: 124889.57
Subtract 4515 from 4650 to get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Step 11:
1350 divided by 645 is 2 with a remainder of 60.
Write down 2 as next digit of the result. 
Result so far: 124889.572
Subtract 1290 from 1350 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
If we divide 600 by 645, we get 0 and a remainder of 600.
The next digit of our result is 0. 
Result so far: 124889.572
If we take 0 away from 600, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 13:
645 can be fit into 6000 9 times, resulting in a remainder of 195.
The next digit of our result is 9. 
Result so far: 124889.57209
Deduct 5805 from 6000 and we're left with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 14:
645 goes into 1950 3 times with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 124889.572093
Deduct 1935 from 1950 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 15:
If we divide 150 by 645, we get 0 and a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 124889.572093
Subtract 0 from 150 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 16:
The number 645 fits into 1500 2 times, leaving a remainder of 210.
The number 2 becomes the next digit in our result. 
Result so far: 124889.57209302
If we subtract 1290 from 1500, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Our division results in 124889.57209302 with a remaining 2.1e-07.