We divide 66143774 by 399
Our goal is to divide 66143774 by 399.

Going ahead to step 1:
399 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 399

Let's proceed to step 2:
If we divide 66 by 399, we get 0 and a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 399

Going ahead to step 3:
When dividing 661 by 399, we get 1 with a remainder of 262.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 399 away from 661, we end up with 262.
Fetch the next digit (4) from the dividend, attach it to 262 and continue: 2624 / 399

Step 4:
The number 399 fits into 2624 6 times, leaving a remainder of 230.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Deduct 2394 from 2624 and we're left with 230.
Bring next digit (3) of the dividend behind the 230 and repeat the process: 2303 / 399

Moving on to step 5:
2303 divided by 399 is 5 with a remainder of 308.
The next digit of our result is 5. 
Result so far: 165.0
The remainder is 308 after subtracting 1995 from 2303.
Bring next digit (7) of the dividend behind the 308 and repeat the process: 3087 / 399

Advancing to step 6:
399 goes into 3087 7 times with a remainder of 294.
Put 7 as the next digit of the answer. 
Result so far: 1657.0
Deduct 2793 from 3087 and we're left with 294.
Bring next digit (7) of the dividend behind the 294 and repeat the process: 2947 / 399

Advancing to step 7:
399 can be fit into 2947 7 times, resulting in a remainder of 154.
The next digit of our result is 7. 
Result so far: 16577.0
Subtract 2793 from 2947 to get 154.
Bring next digit (4) of the dividend behind the 154 and repeat the process: 1544 / 399

On to step 8:
The number 399 fits into 1544 3 times, leaving a remainder of 347.
The number 3 becomes the next digit in our result. 
Result so far: 165773.0
Subtract 1197 from 1544 to get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Going ahead to step 9:
399 goes into 3470 8 times with a remainder of 278.
Record the quotient 8 as the next digit in the result. 
Result so far: 165773.8
If we subtract 3192 from 3470, we get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Step 10:
399 can be fit into 2780 6 times, resulting in a remainder of 386.
The number 6 becomes the next digit in our result. 
Result so far: 165773.86
Deduct 2394 from 2780 and we're left with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Let's proceed to step 11:
399 goes into 3860 9 times with a remainder of 269.
Use 9 as the next digit of our solution. 
Result so far: 165773.869
Subtracting 3591 from 3860 leaves us with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Let's proceed to step 12:
The number 399 fits into 2690 6 times, leaving a remainder of 296.
The next digit of our result is 6. 
Result so far: 165773.8696
If we take 2394 away from 2690, we end up with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 13:
If we divide 2960 by 399, we get 7 and a remainder of 167.
The next digit of our result is 7. 
Result so far: 165773.86967
Subtracting 2793 from 2960 leaves us with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Let's proceed to step 14:
When dividing 1670 by 399, we get 4 with a remainder of 74.
The next digit of our result is 4. 
Result so far: 165773.869674
The remainder is 74 after subtracting 1596 from 1670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 15:
399 can be fit into 740 1 times, resulting in a remainder of 341.
Use 1 as the next digit of our solution. 
Result so far: 165773.8696741
Subtracting 399 from 740 leaves us with 341.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3410, and continue the process.

Let's proceed to step 16:
When dividing 3410 by 399, we get 8 with a remainder of 218.
Record the quotient 8 as the next digit in the result. 
Result so far: 165773.86967418
If we take 3192 away from 3410, we end up with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

The quotient of the division is 165773.86967418, and the remainder is 2.18e-07.