We look at the division of 378984 by 87 
We're looking to find how many times 87 goes into 378984.

Advancing to step 1:
87 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 87

Going ahead to step 2:
If we divide 37 by 87, we get 0 and a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 37 leaves us with 37.
Append the next digit (8) from the dividend to 37 and continue with: 378 / 87

Step 3:
If we divide 378 by 87, we get 4 and a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 348 from 378 leaves us with 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 87

On to step 4:
If we divide 309 by 87, we get 3 and a remainder of 48.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we take 261 away from 309, we end up with 48.
Grab the next digit (8) from the dividend, add it to 48, then carry on: 488 / 87

Advancing to step 5:
The number 87 fits into 488 5 times, leaving a remainder of 53.
Put 5 as the next digit of the answer. 
Result so far: 435.0
Subtracting 435 from 488 leaves us with 53.
Include the next digit (4) from the dividend after 53, then repeat: 534 / 87

On to step 6:
When dividing 534 by 87, we get 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 4356.0
Subtract 522 from 534 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
When dividing 120 by 87, we get 1 with a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 4356.1
The remainder is 33 after subtracting 87 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 8:
87 can be fit into 330 3 times, resulting in a remainder of 69.
Record the quotient 3 as the next digit in the result. 
Result so far: 4356.13
Subtracting 261 from 330 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 9:
87 goes into 690 7 times with a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 4356.137
Subtract 609 from 690 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 10:
87 goes into 810 9 times with a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 4356.1379
If we subtract 783 from 810, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 11:
The number 87 fits into 270 3 times, leaving a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 4356.13793
Subtracting 261 from 270 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 12:
When dividing 90 by 87, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 4356.137931
Subtract 87 from 90 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 13:
30 divided by 87 is 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 4356.137931
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 14:
The number 87 fits into 300 3 times, leaving a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 4356.13793103
If we subtract 261 from 300, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final outcome is 4356.13793103, with a leftover of 3.9e-08.