378051 ÷ 86 
Our goal is to divide 378051 by 86.

Going ahead to step 1:
The number 86 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 86

Let's proceed to step 2:
86 goes into 37 0 times with a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 37 leaves us with 37.
Grab the next digit (8) from the dividend, add it to 37, then carry on: 378 / 86

Let's proceed to step 3:
86 goes into 378 4 times with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 344 from 378, we get 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 86

Advancing to step 4:
When dividing 340 by 86, we get 3 with a remainder of 82.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
The remainder is 82 after subtracting 258 from 340.
Take the next digit (5) from the dividend and append it to 82, then repeat: 825 / 86

Moving on to step 5:
86 can be fit into 825 9 times, resulting in a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 439.0
If we take 774 away from 825, we end up with 51.
Grab the next digit (1) from the dividend, add it to 51, then carry on: 511 / 86

Advancing to step 6:
511 divided by 86 is 5 with a remainder of 81.
The next digit of our result is 5. 
Result so far: 4395.0
Subtracting 430 from 511 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 7:
The number 86 fits into 810 9 times, leaving a remainder of 36.
Put 9 as the next digit of the answer. 
Result so far: 4395.9
If we subtract 774 from 810, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 8:
86 goes into 360 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 4395.94
If we subtract 344 from 360, 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:
160 divided by 86 is 1 with a remainder of 74.
Write down 1 as next digit of the result. 
Result so far: 4395.941
If we subtract 86 from 160, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 10:
If we divide 740 by 86, we get 8 and a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 4395.9418
The remainder is 52 after subtracting 688 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 11:
86 can be fit into 520 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 4395.94186
If we subtract 516 from 520, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 12:
40 divided by 86 is 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 4395.94186
Deduct 0 from 40 and we're left 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.

Moving on to step 13:
86 can be fit into 400 4 times, resulting in a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 4395.9418604
Subtract 344 from 400 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 14:
When dividing 560 by 86, we get 6 with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 4395.94186046
Deduct 516 from 560 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 4395.94186046 with a remainder of 4.4e-08.