63854978 ÷ 390 
We want to divide 63854978 by 390.

Moving on to step 1:
390 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 390

Advancing to step 2:
390 goes into 63 0 times with a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Bring next digit (8) of the dividend behind the 63 and repeat the process: 638 / 390

Moving on to step 3:
The number 390 fits into 638 1 times, leaving a remainder of 248.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 390 from 638 leaves us with 248.
Include the next digit (5) from the dividend after 248, then repeat: 2485 / 390

Let's proceed to step 4:
2485 divided by 390 is 6 with a remainder of 145.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 2340 from 2485, we get 145.
Grab the next digit (4) from the dividend, add it to 145, then carry on: 1454 / 390

On to step 5:
390 goes into 1454 3 times with a remainder of 284.
Use 3 as the next digit of our solution. 
Result so far: 163.0
If we take 1170 away from 1454, we end up with 284.
Bring next digit (9) of the dividend behind the 284 and repeat the process: 2849 / 390

Advancing to step 6:
If we divide 2849 by 390, we get 7 and a remainder of 119.
The number 7 becomes the next digit in our result. 
Result so far: 1637.0
Subtract 2730 from 2849 to get 119.
Bring next digit (7) of the dividend behind the 119 and repeat the process: 1197 / 390

On to step 7:
If we divide 1197 by 390, we get 3 and a remainder of 27.
The next digit of our result is 3. 
Result so far: 16373.0
The remainder is 27 after subtracting 1170 from 1197.
Fetch the next digit (8) from the dividend, attach it to 27 and continue: 278 / 390

Let's proceed to step 8:
When dividing 278 by 390, we get 0 with a remainder of 278.
The next digit of our result is 0. 
Result so far: 163730.0
The remainder is 278 after subtracting 0 from 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Advancing to step 9:
390 goes into 2780 7 times with a remainder of 50.
Write down 7 as next digit of the result. 
Result so far: 163730.7
If we take 2730 away from 2780, 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.

Advancing to step 10:
390 can be fit into 500 1 times, resulting in a remainder of 110.
Use 1 as the next digit of our solution. 
Result so far: 163730.71
If we take 390 away from 500, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 11:
390 goes into 1100 2 times with a remainder of 320.
Use 2 as the next digit of our solution. 
Result so far: 163730.712
If we subtract 780 from 1100, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 12:
When dividing 3200 by 390, we get 8 with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 163730.7128
If we take 3120 away from 3200, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 13:
When dividing 800 by 390, we get 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 163730.71282
Subtracting 780 from 800 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 14:
If we divide 200 by 390, we get 0 and a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 163730.71282
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 15:
2000 divided by 390 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 163730.7128205
Deduct 1950 from 2000 and we're left 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.

On to step 16:
When dividing 500 by 390, we get 1 with a remainder of 110.
The number 1 becomes the next digit in our result. 
Result so far: 163730.71282051
Subtracting 390 from 500 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

The final outcome is 163730.71282051, with a leftover of 1.1e-07.