39478903 divided by 321 
We're looking to find how many times 321 goes into 39478903.

Advancing to step 1:
3 divided by 321 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 321

Step 2:
39 divided by 321 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Fetch the next digit (4) from the dividend, attach it to 39 and continue: 394 / 321

Step 3:
When dividing 394 by 321, we get 1 with a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 73 after subtracting 321 from 394.
Fetch the next digit (7) from the dividend, attach it to 73 and continue: 737 / 321

Advancing to step 4:
When dividing 737 by 321, we get 2 with a remainder of 95.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 642 from 737 leaves us with 95.
Grab the next digit (8) from the dividend, add it to 95, then carry on: 958 / 321

Let's proceed to step 5:
When dividing 958 by 321, we get 2 with a remainder of 316.
Write down 2 as next digit of the result. 
Result so far: 122.0
Deduct 642 from 958 and we're left with 316.
Fetch the next digit (9) from the dividend, attach it to 316 and continue: 3169 / 321

Step 6:
If we divide 3169 by 321, we get 9 and a remainder of 280.
Record the quotient 9 as the next digit in the result. 
Result so far: 1229.0
If we take 2889 away from 3169, we end up with 280.
Grab the next digit (0) from the dividend, add it to 280, then carry on: 2800 / 321

Advancing to step 7:
When dividing 2800 by 321, we get 8 with a remainder of 232.
Use 8 as the next digit of our solution. 
Result so far: 12298.0
Subtracting 2568 from 2800 leaves us with 232.
Take the next digit (3) from the dividend and append it to 232, then repeat: 2323 / 321

Step 8:
When dividing 2323 by 321, we get 7 with a remainder of 76.
Write down 7 as next digit of the result. 
Result so far: 122987.0
Subtract 2247 from 2323 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
321 can be fit into 760 2 times, resulting in a remainder of 118.
Write down 2 as next digit of the result. 
Result so far: 122987.2
Deduct 642 from 760 and we're left with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 10:
The number 321 fits into 1180 3 times, leaving a remainder of 217.
The next digit of our result is 3. 
Result so far: 122987.23
Subtracting 963 from 1180 leaves us with 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Step 11:
When dividing 2170 by 321, we get 6 with a remainder of 244.
Use 6 as the next digit of our solution. 
Result so far: 122987.236
Subtract 1926 from 2170 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Let's proceed to step 12:
If we divide 2440 by 321, we get 7 and a remainder of 193.
The next digit of our result is 7. 
Result so far: 122987.2367
If we take 2247 away from 2440, we end up with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Step 13:
When dividing 1930 by 321, we get 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 122987.23676
Deduct 1926 from 1930 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
321 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 122987.23676
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 15:
321 goes into 400 1 times with a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 122987.2367601
Subtract 321 from 400 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 16:
790 divided by 321 is 2 with a remainder of 148.
Use 2 as the next digit of our solution. 
Result so far: 122987.23676012
Deduct 642 from 790 and we're left with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

The quotient of the division is 122987.23676012, and the remainder is 1.48e-07.