51423 divided by 87 
We want to divide 51423 by 87.

On to step 1:
The number 87 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 87

On to step 2:
The number 87 fits into 51 0 times, leaving a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Include the next digit (4) from the dividend after 51, then repeat: 514 / 87

Moving on to step 3:
87 goes into 514 5 times with a remainder of 79.
The next digit of our result is 5. 
Result so far: 5.0
If we take 435 away from 514, we end up with 79.
Take the next digit (2) from the dividend and append it to 79, then repeat: 792 / 87

Going ahead to step 4:
87 can be fit into 792 9 times, resulting in a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 59.0
Subtracting 783 from 792 leaves us with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 87

Going ahead to step 5:
87 can be fit into 93 1 times, resulting in a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 591.0
Subtract 87 from 93 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 6:
60 divided by 87 is 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 591.0
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 7:
The number 87 fits into 600 6 times, leaving a remainder of 78.
The next digit of our result is 6. 
Result so far: 591.06
If we subtract 522 from 600, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 8:
When dividing 780 by 87, we get 8 with a remainder of 84.
Use 8 as the next digit of our solution. 
Result so far: 591.068
Subtract 696 from 780 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 9:
840 divided by 87 is 9 with a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 591.0689
Deduct 783 from 840 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 10:
87 can be fit into 570 6 times, resulting in a remainder of 48.
The next digit of our result is 6. 
Result so far: 591.06896
Subtract 522 from 570 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 11:
87 can be fit into 480 5 times, resulting in a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 591.068965
If we take 435 away from 480, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 12:
When dividing 450 by 87, we get 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 591.0689655
Deduct 435 from 450 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 591.0689655 and a remainder of 1.5e-07.