Let's divide 81200668 by 390
Let's see how many times 390 fits into 81200668.

Step 1:
When dividing 8 by 390, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 390

Going ahead to step 2:
The number 390 fits into 81 0 times, leaving a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Bring next digit (2) of the dividend behind the 81 and repeat the process: 812 / 390

Going ahead to step 3:
390 can be fit into 812 2 times, resulting in a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 780 from 812, we get 32.
Take the next digit (0) from the dividend and append it to 32, then repeat: 320 / 390

Step 4:
320 divided by 390 is 0 with a remainder of 320.
Use 0 as the next digit of our solution. 
Result so far: 20.0
The remainder is 320 after subtracting 0 from 320.
Grab the next digit (0) from the dividend, add it to 320, then carry on: 3200 / 390

Step 5:
If we divide 3200 by 390, we get 8 and a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 208.0
If we take 3120 away from 3200, we end up with 80.
Append the next digit (6) from the dividend to 80 and continue with: 806 / 390

Going ahead to step 6:
390 goes into 806 2 times with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 2082.0
Subtract 780 from 806 to get 26.
Include the next digit (6) from the dividend after 26, then repeat: 266 / 390

Step 7:
390 can be fit into 266 0 times, resulting in a remainder of 266.
Use 0 as the next digit of our solution. 
Result so far: 20820.0
If we take 0 away from 266, we end up with 266.
Grab the next digit (8) from the dividend, add it to 266, then carry on: 2668 / 390

On to step 8:
2668 divided by 390 is 6 with a remainder of 328.
Write down 6 as next digit of the result. 
Result so far: 208206.0
Subtracting 2340 from 2668 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Advancing to step 9:
The number 390 fits into 3280 8 times, leaving a remainder of 160.
Use 8 as the next digit of our solution. 
Result so far: 208206.8
Subtract 3120 from 3280 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 10:
The number 390 fits into 1600 4 times, leaving a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 208206.84
Subtracting 1560 from 1600 leaves us 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.

Step 11:
The number 390 fits into 400 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 208206.841
Deduct 390 from 400 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
390 can be fit into 100 0 times, resulting in a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 208206.841
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.

On to step 13:
390 goes into 1000 2 times with a remainder of 220.
Put 2 as the next digit of the answer. 
Result so far: 208206.84102
If we subtract 780 from 1000, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 14:
If we divide 2200 by 390, we get 5 and a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 208206.841025
Subtracting 1950 from 2200 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Step 15:
When dividing 2500 by 390, we get 6 with a remainder of 160.
The next digit of our result is 6. 
Result so far: 208206.8410256
If we take 2340 away from 2500, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 16:
1600 divided by 390 is 4 with a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 208206.84102564
If we take 1560 away from 1600, 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.

The final result is 208206.84102564 with a remainder of 4e-08.