3621 divided by 87 
We're looking to find how many times 87 goes into 3621.

Let's proceed to step 1:
When dividing 3 by 87, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 87

Moving on to step 2:
36 divided by 87 is 0 with a remainder of 36.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 36 leaves us with 36.
Bring next digit (2) of the dividend behind the 36 and repeat the process: 362 / 87

Advancing to step 3:
When dividing 362 by 87, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 348 from 362, we get 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 87

Moving on to step 4:
If we divide 141 by 87, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 41.0
Subtract 87 from 141 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 5:
When dividing 540 by 87, we get 6 with a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 41.6
Deduct 522 from 540 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 6:
If we divide 180 by 87, we get 2 and a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 41.62
Deduct 174 from 180 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
87 goes into 60 0 times with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 41.62
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
87 goes into 600 6 times with a remainder of 78.
The next digit of our result is 6. 
Result so far: 41.6206
Subtracting 522 from 600 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 9:
87 can be fit into 780 8 times, resulting in a remainder of 84.
The next digit of our result is 8. 
Result so far: 41.62068
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.

Advancing to step 10:
87 can be fit into 840 9 times, resulting in a remainder of 57.
Write down 9 as next digit of the result. 
Result so far: 41.620689
Subtracting 783 from 840 leaves us 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 11:
87 goes into 570 6 times with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 41.6206896
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.

Let's proceed to step 12:
The number 87 fits into 480 5 times, leaving a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 41.62068965
The remainder is 45 after subtracting 435 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 41.62068965, with a leftover of 4.5e-08.