Let's divide 59001519 by 645
We're looking to find how many times 645 goes into 59001519.

On to step 1:
645 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 645

Advancing to step 2:
The number 645 fits into 59 0 times, leaving a remainder of 59.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 59, we get 59.
Fetch the next digit (0) from the dividend, attach it to 59 and continue: 590 / 645

Going ahead to step 3:
If we divide 590 by 645, we get 0 and a remainder of 590.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 590 to get 590.
Append the next digit (0) from the dividend to 590 and continue with: 5900 / 645

Advancing to step 4:
645 can be fit into 5900 9 times, resulting in a remainder of 95.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 5805 from 5900, we get 95.
Grab the next digit (1) from the dividend, add it to 95, then carry on: 951 / 645

On to step 5:
645 goes into 951 1 times with a remainder of 306.
Put 1 as the next digit of the answer. 
Result so far: 91.0
The remainder is 306 after subtracting 645 from 951.
Take the next digit (5) from the dividend and append it to 306, then repeat: 3065 / 645

Advancing to step 6:
645 can be fit into 3065 4 times, resulting in a remainder of 485.
Write down 4 as next digit of the result. 
Result so far: 914.0
Subtracting 2580 from 3065 leaves us with 485.
Fetch the next digit (1) from the dividend, attach it to 485 and continue: 4851 / 645

Moving on to step 7:
4851 divided by 645 is 7 with a remainder of 336.
Record the quotient 7 as the next digit in the result. 
Result so far: 9147.0
Subtract 4515 from 4851 to get 336.
Fetch the next digit (9) from the dividend, attach it to 336 and continue: 3369 / 645

Advancing to step 8:
When dividing 3369 by 645, we get 5 with a remainder of 144.
The number 5 becomes the next digit in our result. 
Result so far: 91475.0
If we subtract 3225 from 3369, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 9:
When dividing 1440 by 645, we get 2 with a remainder of 150.
The number 2 becomes the next digit in our result. 
Result so far: 91475.2
Subtracting 1290 from 1440 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 10:
1500 divided by 645 is 2 with a remainder of 210.
Write down 2 as next digit of the result. 
Result so far: 91475.22
Subtracting 1290 from 1500 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

The final outcome is 91475.22, with a leftover of 0.21.