We're dividing 64376399 by 210 
We want to divide 64376399 by 210.

Going ahead to step 1:
When dividing 6 by 210, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 210

On to step 2:
If we divide 64 by 210, we get 0 and a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (3) from the dividend, attach it to 64 and continue: 643 / 210

On to step 3:
When dividing 643 by 210, we get 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 630 from 643 to get 13.
Include the next digit (7) from the dividend after 13, then repeat: 137 / 210

Let's proceed to step 4:
When dividing 137 by 210, we get 0 with a remainder of 137.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Deduct 0 from 137 and we're left with 137.
Fetch the next digit (6) from the dividend, attach it to 137 and continue: 1376 / 210

Moving on to step 5:
If we divide 1376 by 210, we get 6 and a remainder of 116.
Use 6 as the next digit of our solution. 
Result so far: 306.0
The remainder is 116 after subtracting 1260 from 1376.
Bring next digit (3) of the dividend behind the 116 and repeat the process: 1163 / 210

Step 6:
1163 divided by 210 is 5 with a remainder of 113.
The next digit of our result is 5. 
Result so far: 3065.0
Subtract 1050 from 1163 to get 113.
Grab the next digit (9) from the dividend, add it to 113, then carry on: 1139 / 210

Moving on to step 7:
If we divide 1139 by 210, we get 5 and a remainder of 89.
Use 5 as the next digit of our solution. 
Result so far: 30655.0
Subtract 1050 from 1139 to get 89.
Append the next digit (9) from the dividend to 89 and continue with: 899 / 210

Advancing to step 8:
210 can be fit into 899 4 times, resulting in a remainder of 59.
Use 4 as the next digit of our solution. 
Result so far: 306554.0
Subtracting 840 from 899 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 9:
590 divided by 210 is 2 with a remainder of 170.
Write down 2 as next digit of the result. 
Result so far: 306554.2
Subtract 420 from 590 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 10:
1700 divided by 210 is 8 with a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 306554.28
Subtract 1680 from 1700 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
When dividing 200 by 210, we get 0 with a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 306554.28
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 12:
When dividing 2000 by 210, we get 9 with a remainder of 110.
Put 9 as the next digit of the answer. 
Result so far: 306554.2809
The remainder is 110 after subtracting 1890 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Advancing to step 13:
The number 210 fits into 1100 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 306554.28095
If we take 1050 away from 1100, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 14:
500 divided by 210 is 2 with a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 306554.280952
Subtract 420 from 500 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 15:
If we divide 800 by 210, we get 3 and a remainder of 170.
Record the quotient 3 as the next digit in the result. 
Result so far: 306554.2809523
Deduct 630 from 800 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 16:
210 can be fit into 1700 8 times, resulting in a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 306554.28095238
Subtract 1680 from 1700 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 306554.28095238 with a remaining 2e-08.