401691 ÷ 87 
We're looking to find how many times 87 goes into 401691.

Step 1:
4 divided by 87 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 87

Advancing to step 2:
87 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Append the next digit (1) from the dividend to 40 and continue with: 401 / 87

On to step 3:
401 divided by 87 is 4 with a remainder of 53.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 53 after subtracting 348 from 401.
Fetch the next digit (6) from the dividend, attach it to 53 and continue: 536 / 87

Moving on to step 4:
87 goes into 536 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
Deduct 522 from 536 and we're left with 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 87

Moving on to step 5:
When dividing 149 by 87, we get 1 with a remainder of 62.
The next digit of our result is 1. 
Result so far: 461.0
If we take 87 away from 149, we end up with 62.
Grab the next digit (1) from the dividend, add it to 62, then carry on: 621 / 87

Advancing to step 6:
The number 87 fits into 621 7 times, leaving a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 4617.0
Subtract 609 from 621 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.
Write down 1 as next digit of the result. 
Result so far: 4617.1
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.

Let's proceed to step 8:
87 goes into 330 3 times with a remainder of 69.
Use 3 as the next digit of our solution. 
Result so far: 4617.13
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.

Let's proceed to step 9:
87 goes into 690 7 times with a remainder of 81.
Write down 7 as next digit of the result. 
Result so far: 4617.137
Deduct 609 from 690 and we're left 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.

Advancing to step 10:
87 can be fit into 810 9 times, resulting in a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 4617.1379
Deduct 783 from 810 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 11:
The number 87 fits into 270 3 times, leaving a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 4617.13793
The remainder is 9 after subtracting 261 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 12:
87 goes into 90 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 4617.137931
Subtracting 87 from 90 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 13:
If we divide 30 by 87, we get 0 and a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 4617.137931
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 14:
The number 87 fits into 300 3 times, leaving a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 4617.13793103
Deduct 261 from 300 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Our division results in 4617.13793103 with a remaining 3.9e-08.