We look at the division of 58358971 by 645 
We want to figure out the number of times 58358971 can be divided by 645.

Let's proceed to step 1:
The number 645 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 645

On to step 2:
58 divided by 645 is 0 with a remainder of 58.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 58 leaves us with 58.
Append the next digit (3) from the dividend to 58 and continue with: 583 / 645

Step 3:
645 goes into 583 0 times with a remainder of 583.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 583 after subtracting 0 from 583.
Fetch the next digit (5) from the dividend, attach it to 583 and continue: 5835 / 645

Advancing to step 4:
If we divide 5835 by 645, we get 9 and a remainder of 30.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 30 after subtracting 5805 from 5835.
Include the next digit (8) from the dividend after 30, then repeat: 308 / 645

Moving on to step 5:
If we divide 308 by 645, we get 0 and a remainder of 308.
The number 0 becomes the next digit in our result. 
Result so far: 90.0
If we take 0 away from 308, we end up with 308.
Bring next digit (9) of the dividend behind the 308 and repeat the process: 3089 / 645

Let's proceed to step 6:
The number 645 fits into 3089 4 times, leaving a remainder of 509.
Use 4 as the next digit of our solution. 
Result so far: 904.0
The remainder is 509 after subtracting 2580 from 3089.
Include the next digit (7) from the dividend after 509, then repeat: 5097 / 645

Let's proceed to step 7:
645 can be fit into 5097 7 times, resulting in a remainder of 582.
Write down 7 as next digit of the result. 
Result so far: 9047.0
Subtract 4515 from 5097 to get 582.
Append the next digit (1) from the dividend to 582 and continue with: 5821 / 645

On to step 8:
If we divide 5821 by 645, we get 9 and a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 90479.0
Deduct 5805 from 5821 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
The number 645 fits into 160 0 times, leaving a remainder of 160.
Use 0 as the next digit of our solution. 
Result so far: 90479.0
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 10:
If we divide 1600 by 645, we get 2 and a remainder of 310.
The number 2 becomes the next digit in our result. 
Result so far: 90479.02
The remainder is 310 after subtracting 1290 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Moving on to step 11:
The number 645 fits into 3100 4 times, leaving a remainder of 520.
The next digit of our result is 4. 
Result so far: 90479.024
Subtracting 2580 from 3100 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 12:
The number 645 fits into 5200 8 times, leaving a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 90479.0248
If we subtract 5160 from 5200, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 13:
When dividing 400 by 645, we get 0 with a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 90479.0248
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 14:
When dividing 4000 by 645, we get 6 with a remainder of 130.
Put 6 as the next digit of the answer. 
Result so far: 90479.024806
If we subtract 3870 from 4000, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 15:
The number 645 fits into 1300 2 times, leaving a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 90479.0248062
Subtract 1290 from 1300 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 16:
The number 645 fits into 100 0 times, leaving a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 90479.0248062
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final result is 90479.0248062 with a remainder of 1e-07.