We're dividing 301561 by 78 
Let's see how many times 78 fits into 301561.

On to step 1:
If we divide 3 by 78, we get 0 and 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.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 78

Advancing to step 2:
78 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Include the next digit (1) from the dividend after 30, then repeat: 301 / 78

Step 3:
301 divided by 78 is 3 with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 234 away from 301, we end up with 67.
Take the next digit (5) from the dividend and append it to 67, then repeat: 675 / 78

Advancing to step 4:
The number 78 fits into 675 8 times, leaving a remainder of 51.
The next digit of our result is 8. 
Result so far: 38.0
The remainder is 51 after subtracting 624 from 675.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 78

Advancing to step 5:
If we divide 516 by 78, we get 6 and a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 386.0
The remainder is 48 after subtracting 468 from 516.
Fetch the next digit (1) from the dividend, attach it to 48 and continue: 481 / 78

Advancing to step 6:
78 can be fit into 481 6 times, resulting in a remainder of 13.
The number 6 becomes the next digit in our result. 
Result so far: 3866.0
If we take 468 away from 481, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
The number 78 fits into 130 1 times, leaving a remainder of 52.
The next digit of our result is 1. 
Result so far: 3866.1
Subtract 78 from 130 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 8:
When dividing 520 by 78, we get 6 with a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 3866.16
Deduct 468 from 520 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 9:
78 goes into 520 6 times with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 3866.166
If we take 468 away from 520, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final result is 3866.166 with a remainder of 0.0052.