We divide 58125021 by 645
We're looking to find how many times 645 goes into 58125021.

Moving on to step 1:
If we divide 5 by 645, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 645

Step 2:
If we divide 58 by 645, we get 0 and a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 58 to get 58.
Take the next digit (1) from the dividend and append it to 58, then repeat: 581 / 645

Step 3:
645 can be fit into 581 0 times, resulting in a remainder of 581.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 581, we end up with 581.
Take the next digit (2) from the dividend and append it to 581, then repeat: 5812 / 645

On to step 4:
When dividing 5812 by 645, we get 9 with a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 7 after subtracting 5805 from 5812.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 645

Moving on to step 5:
645 goes into 75 0 times with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 90.0
Deduct 0 from 75 and we're left with 75.
Include the next digit (0) from the dividend after 75, then repeat: 750 / 645

Advancing to step 6:
The number 645 fits into 750 1 times, leaving a remainder of 105.
The next digit of our result is 1. 
Result so far: 901.0
If we subtract 645 from 750, we get 105.
Append the next digit (2) from the dividend to 105 and continue with: 1052 / 645

Moving on to step 7:
If we divide 1052 by 645, we get 1 and a remainder of 407.
The next digit of our result is 1. 
Result so far: 9011.0
The remainder is 407 after subtracting 645 from 1052.
Grab the next digit (1) from the dividend, add it to 407, then carry on: 4071 / 645

Advancing to step 8:
If we divide 4071 by 645, we get 6 and a remainder of 201.
Put 6 as the next digit of the answer. 
Result so far: 90116.0
Subtracting 3870 from 4071 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 9:
645 can be fit into 2010 3 times, resulting in a remainder of 75.
Record the quotient 3 as the next digit in the result. 
Result so far: 90116.3
The remainder is 75 after subtracting 1935 from 2010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 10:
645 goes into 750 1 times with a remainder of 105.
Put 1 as the next digit of the answer. 
Result so far: 90116.31
If we take 645 away from 750, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Step 11:
The number 645 fits into 1050 1 times, leaving a remainder of 405.
The number 1 becomes the next digit in our result. 
Result so far: 90116.311
Deduct 645 from 1050 and we're left with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

In conclusion, the division gives 90116.311 with a balance of 0.0405.