38984815 ÷ 643 
We want to figure out the number of times 38984815 can be divided by 643.

On to step 1:
If we divide 3 by 643, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 643

Let's proceed to step 2:
The number 643 fits into 38 0 times, leaving a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Take the next digit (9) from the dividend and append it to 38, then repeat: 389 / 643

Moving on to step 3:
643 can be fit into 389 0 times, resulting in a remainder of 389.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 389 after subtracting 0 from 389.
Grab the next digit (8) from the dividend, add it to 389, then carry on: 3898 / 643

Going ahead to step 4:
If we divide 3898 by 643, we get 6 and a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 3858 from 3898 to get 40.
Fetch the next digit (4) from the dividend, attach it to 40 and continue: 404 / 643

Let's proceed to step 5:
The number 643 fits into 404 0 times, leaving a remainder of 404.
The next digit of our result is 0. 
Result so far: 60.0
If we subtract 0 from 404, we get 404.
Bring next digit (8) of the dividend behind the 404 and repeat the process: 4048 / 643

Moving on to step 6:
The number 643 fits into 4048 6 times, leaving a remainder of 190.
The next digit of our result is 6. 
Result so far: 606.0
The remainder is 190 after subtracting 3858 from 4048.
Grab the next digit (1) from the dividend, add it to 190, then carry on: 1901 / 643

Moving on to step 7:
1901 divided by 643 is 2 with a remainder of 615.
Record the quotient 2 as the next digit in the result. 
Result so far: 6062.0
Deduct 1286 from 1901 and we're left with 615.
Append the next digit (5) from the dividend to 615 and continue with: 6155 / 643

Moving on to step 8:
If we divide 6155 by 643, we get 9 and a remainder of 368.
The next digit of our result is 9. 
Result so far: 60629.0
The remainder is 368 after subtracting 5787 from 6155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 9:
When dividing 3680 by 643, we get 5 with a remainder of 465.
Record the quotient 5 as the next digit in the result. 
Result so far: 60629.5
Deduct 3215 from 3680 and we're left with 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Going ahead to step 10:
If we divide 4650 by 643, we get 7 and a remainder of 149.
The next digit of our result is 7. 
Result so far: 60629.57
If we subtract 4501 from 4650, we get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Step 11:
643 can be fit into 1490 2 times, resulting in a remainder of 204.
Write down 2 as next digit of the result. 
Result so far: 60629.572
Deduct 1286 from 1490 and we're left with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Going ahead to step 12:
The number 643 fits into 2040 3 times, leaving a remainder of 111.
The next digit of our result is 3. 
Result so far: 60629.5723
Deduct 1929 from 2040 and we're left with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Going ahead to step 13:
643 goes into 1110 1 times with a remainder of 467.
Put 1 as the next digit of the answer. 
Result so far: 60629.57231
Subtracting 643 from 1110 leaves us with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Advancing to step 14:
If we divide 4670 by 643, we get 7 and a remainder of 169.
The next digit of our result is 7. 
Result so far: 60629.572317
Deduct 4501 from 4670 and we're left with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Going ahead to step 15:
643 can be fit into 1690 2 times, resulting in a remainder of 404.
The number 2 becomes the next digit in our result. 
Result so far: 60629.5723172
Subtracting 1286 from 1690 leaves us with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 16:
643 goes into 4040 6 times with a remainder of 182.
Put 6 as the next digit of the answer. 
Result so far: 60629.57231726
If we take 3858 away from 4040, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

The final outcome is 60629.57231726, with a leftover of 1.82e-07.