Let's divide 80588005 by 645
We want to divide 80588005 by 645.

Step 1:
When dividing 8 by 645, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 645

Going ahead to step 2:
When dividing 80 by 645, we get 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 80 after subtracting 0 from 80.
Grab the next digit (5) from the dividend, add it to 80, then carry on: 805 / 645

Step 3:
805 divided by 645 is 1 with a remainder of 160.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 645 from 805 to get 160.
Fetch the next digit (8) from the dividend, attach it to 160 and continue: 1608 / 645

Moving on to step 4:
When dividing 1608 by 645, we get 2 with a remainder of 318.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 1290 from 1608 to get 318.
Grab the next digit (8) from the dividend, add it to 318, then carry on: 3188 / 645

Moving on to step 5:
645 goes into 3188 4 times with a remainder of 608.
Use 4 as the next digit of our solution. 
Result so far: 124.0
If we take 2580 away from 3188, we end up with 608.
Grab the next digit (0) from the dividend, add it to 608, then carry on: 6080 / 645

Moving on to step 6:
When dividing 6080 by 645, we get 9 with a remainder of 275.
Put 9 as the next digit of the answer. 
Result so far: 1249.0
The remainder is 275 after subtracting 5805 from 6080.
Bring next digit (0) of the dividend behind the 275 and repeat the process: 2750 / 645

On to step 7:
If we divide 2750 by 645, we get 4 and a remainder of 170.
Record the quotient 4 as the next digit in the result. 
Result so far: 12494.0
The remainder is 170 after subtracting 2580 from 2750.
Append the next digit (5) from the dividend to 170 and continue with: 1705 / 645

Let's proceed to step 8:
645 goes into 1705 2 times with a remainder of 415.
Write down 2 as next digit of the result. 
Result so far: 124942.0
If we take 1290 away from 1705, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Step 9:
645 goes into 4150 6 times with a remainder of 280.
The number 6 becomes the next digit in our result. 
Result so far: 124942.6
The remainder is 280 after subtracting 3870 from 4150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 10:
2800 divided by 645 is 4 with a remainder of 220.
Use 4 as the next digit of our solution. 
Result so far: 124942.64
The remainder is 220 after subtracting 2580 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 11:
645 can be fit into 2200 3 times, resulting in a remainder of 265.
Record the quotient 3 as the next digit in the result. 
Result so far: 124942.643
Deduct 1935 from 2200 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

On to step 12:
The number 645 fits into 2650 4 times, leaving a remainder of 70.
Put 4 as the next digit of the answer. 
Result so far: 124942.6434
Subtracting 2580 from 2650 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 13:
If we divide 700 by 645, we get 1 and a remainder of 55.
The next digit of our result is 1. 
Result so far: 124942.64341
If we take 645 away from 700, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 14:
550 divided by 645 is 0 with a remainder of 550.
Put 0 as the next digit of the answer. 
Result so far: 124942.64341
If we subtract 0 from 550, we get 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Moving on to step 15:
If we divide 5500 by 645, we get 8 and a remainder of 340.
Put 8 as the next digit of the answer. 
Result so far: 124942.6434108
If we take 5160 away from 5500, we end up with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 16:
The number 645 fits into 3400 5 times, leaving a remainder of 175.
Write down 5 as next digit of the result. 
Result so far: 124942.64341085
The remainder is 175 after subtracting 3225 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

The final outcome is 124942.64341085, with a leftover of 1.75e-07.