We divide 315571 by 78
Let's see how many times 78 fits into 315571.

Going ahead to step 1:
The number 78 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 78

Step 2:
If we divide 31 by 78, we get 0 and a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 78

Step 3:
78 can be fit into 315 4 times, resulting in a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 312 from 315 leaves us with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 78

On to step 4:
The number 78 fits into 35 0 times, leaving a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtract 0 from 35 to get 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 78

Moving on to step 5:
If we divide 357 by 78, we get 4 and a remainder of 45.
The next digit of our result is 4. 
Result so far: 404.0
Deduct 312 from 357 and we're left with 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 78

Advancing to step 6:
78 goes into 451 5 times with a remainder of 61.
Write down 5 as next digit of the result. 
Result so far: 4045.0
Subtracting 390 from 451 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 7:
The number 78 fits into 610 7 times, leaving a remainder of 64.
Put 7 as the next digit of the answer. 
Result so far: 4045.7
Deduct 546 from 610 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 8:
78 goes into 640 8 times with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 4045.78
If we subtract 624 from 640, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
When dividing 160 by 78, we get 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 4045.782
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 10:
40 divided by 78 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 4045.782
If we take 0 away from 40, 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.

Step 11:
If we divide 400 by 78, we get 5 and a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4045.78205
Subtract 390 from 400 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
78 can be fit into 100 1 times, resulting in a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 4045.782051
Deduct 78 from 100 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 13:
220 divided by 78 is 2 with a remainder of 64.
Write down 2 as next digit of the result. 
Result so far: 4045.7820512
Subtracting 156 from 220 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 14:
78 goes into 640 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 4045.78205128
Deduct 624 from 640 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 4045.78205128, with a leftover of 1.6e-08.