45842559 ÷ 621 
We want to figure out the number of times 45842559 can be divided by 621.

Moving on to step 1:
When dividing 4 by 621, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 621

Step 2:
621 can be fit into 45 0 times, resulting in a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Bring next digit (8) of the dividend behind the 45 and repeat the process: 458 / 621

Let's proceed to step 3:
The number 621 fits into 458 0 times, leaving a remainder of 458.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 458 after subtracting 0 from 458.
Fetch the next digit (4) from the dividend, attach it to 458 and continue: 4584 / 621

Advancing to step 4:
If we divide 4584 by 621, we get 7 and a remainder of 237.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 4347 away from 4584, we end up with 237.
Bring next digit (2) of the dividend behind the 237 and repeat the process: 2372 / 621

On to step 5:
When dividing 2372 by 621, we get 3 with a remainder of 509.
Put 3 as the next digit of the answer. 
Result so far: 73.0
If we subtract 1863 from 2372, we get 509.
Grab the next digit (5) from the dividend, add it to 509, then carry on: 5095 / 621

Advancing to step 6:
621 goes into 5095 8 times with a remainder of 127.
The number 8 becomes the next digit in our result. 
Result so far: 738.0
The remainder is 127 after subtracting 4968 from 5095.
Include the next digit (5) from the dividend after 127, then repeat: 1275 / 621

Let's proceed to step 7:
621 can be fit into 1275 2 times, resulting in a remainder of 33.
Use 2 as the next digit of our solution. 
Result so far: 7382.0
Subtracting 1242 from 1275 leaves us with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 621

On to step 8:
621 goes into 339 0 times with a remainder of 339.
The number 0 becomes the next digit in our result. 
Result so far: 73820.0
Subtract 0 from 339 to get 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

On to step 9:
621 can be fit into 3390 5 times, resulting in a remainder of 285.
The next digit of our result is 5. 
Result so far: 73820.5
Deduct 3105 from 3390 and we're left with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Going ahead to step 10:
2850 divided by 621 is 4 with a remainder of 366.
Record the quotient 4 as the next digit in the result. 
Result so far: 73820.54
Subtracting 2484 from 2850 leaves us with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Advancing to step 11:
621 can be fit into 3660 5 times, resulting in a remainder of 555.
Write down 5 as next digit of the result. 
Result so far: 73820.545
Deduct 3105 from 3660 and we're left with 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

Step 12:
621 can be fit into 5550 8 times, resulting in a remainder of 582.
Record the quotient 8 as the next digit in the result. 
Result so far: 73820.5458
If we subtract 4968 from 5550, we get 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Moving on to step 13:
621 goes into 5820 9 times with a remainder of 231.
Write down 9 as next digit of the result. 
Result so far: 73820.54589
Subtract 5589 from 5820 to get 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Going ahead to step 14:
If we divide 2310 by 621, we get 3 and a remainder of 447.
Write down 3 as next digit of the result. 
Result so far: 73820.545893
Deduct 1863 from 2310 and we're left with 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

On to step 15:
If we divide 4470 by 621, we get 7 and a remainder of 123.
The next digit of our result is 7. 
Result so far: 73820.5458937
If we subtract 4347 from 4470, we get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Step 16:
621 can be fit into 1230 1 times, resulting in a remainder of 609.
Write down 1 as next digit of the result. 
Result so far: 73820.54589371
If we take 621 away from 1230, we end up with 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

After the division, we end up with 73820.54589371 and a remainder of 6.09e-07.