13877377 ÷ 390 
Let's see how many times 390 fits into 13877377.

Moving on to step 1:
When dividing 1 by 390, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 390

Step 2:
When dividing 13 by 390, we get 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 390

Going ahead to step 3:
390 can be fit into 138 0 times, resulting in a remainder of 138.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 138 leaves us with 138.
Include the next digit (7) from the dividend after 138, then repeat: 1387 / 390

Moving on to step 4:
When dividing 1387 by 390, we get 3 with a remainder of 217.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 217 after subtracting 1170 from 1387.
Bring next digit (7) of the dividend behind the 217 and repeat the process: 2177 / 390

Advancing to step 5:
390 can be fit into 2177 5 times, resulting in a remainder of 227.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we take 1950 away from 2177, we end up with 227.
Bring next digit (3) of the dividend behind the 227 and repeat the process: 2273 / 390

Moving on to step 6:
390 goes into 2273 5 times with a remainder of 323.
The number 5 becomes the next digit in our result. 
Result so far: 355.0
Deduct 1950 from 2273 and we're left with 323.
Append the next digit (7) from the dividend to 323 and continue with: 3237 / 390

Advancing to step 7:
3237 divided by 390 is 8 with a remainder of 117.
Write down 8 as next digit of the result. 
Result so far: 3558.0
Subtract 3120 from 3237 to get 117.
Append the next digit (7) from the dividend to 117 and continue with: 1177 / 390

Let's proceed to step 8:
390 goes into 1177 3 times with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 35583.0
If we take 1170 away from 1177, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
If we divide 70 by 390, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 35583.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
The number 390 fits into 700 1 times, leaving a remainder of 310.
The next digit of our result is 1. 
Result so far: 35583.01
Subtract 390 from 700 to get 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Going ahead to step 11:
390 goes into 3100 7 times with a remainder of 370.
Use 7 as the next digit of our solution. 
Result so far: 35583.017
Deduct 2730 from 3100 and we're left with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 12:
The number 390 fits into 3700 9 times, leaving a remainder of 190.
The number 9 becomes the next digit in our result. 
Result so far: 35583.0179
Deduct 3510 from 3700 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 13:
The number 390 fits into 1900 4 times, leaving a remainder of 340.
The number 4 becomes the next digit in our result. 
Result so far: 35583.01794
Subtracting 1560 from 1900 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 14:
3400 divided by 390 is 8 with a remainder of 280.
Use 8 as the next digit of our solution. 
Result so far: 35583.017948
The remainder is 280 after subtracting 3120 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 15:
When dividing 2800 by 390, we get 7 with a remainder of 70.
The next digit of our result is 7. 
Result so far: 35583.0179487
Subtracting 2730 from 2800 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 16:
390 can be fit into 700 1 times, resulting in a remainder of 310.
The next digit of our result is 1. 
Result so far: 35583.01794871
Subtract 390 from 700 to get 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

The final outcome is 35583.01794871, with a leftover of 3.1e-07.