306993 divided by 87 
We want to figure out the number of times 306993 can be divided by 87.

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
Deduct 0 from 3 and we're left with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 87

Moving on to step 2:
When dividing 30 by 87, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Include the next digit (6) from the dividend after 30, then repeat: 306 / 87

Step 3:
If we divide 306 by 87, we get 3 and a remainder of 45.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 261 away from 306, we end up with 45.
Fetch the next digit (9) from the dividend, attach it to 45 and continue: 459 / 87

Advancing to step 4:
87 goes into 459 5 times with a remainder of 24.
Write down 5 as next digit of the result. 
Result so far: 35.0
If we subtract 435 from 459, we get 24.
Fetch the next digit (9) from the dividend, attach it to 24 and continue: 249 / 87

Step 5:
When dividing 249 by 87, we get 2 with a remainder of 75.
Write down 2 as next digit of the result. 
Result so far: 352.0
If we subtract 174 from 249, we get 75.
Bring next digit (3) of the dividend behind the 75 and repeat the process: 753 / 87

Advancing to step 6:
If we divide 753 by 87, we get 8 and a remainder of 57.
Record the quotient 8 as the next digit in the result. 
Result so far: 3528.0
The remainder is 57 after subtracting 696 from 753.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 7:
When dividing 570 by 87, we get 6 with a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 3528.6
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.

Going ahead to step 8:
87 can be fit into 480 5 times, resulting in a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 3528.65
Subtracting 435 from 480 leaves us 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.

Step 9:
The number 87 fits into 450 5 times, leaving a remainder of 15.
The next digit of our result is 5. 
Result so far: 3528.655
Subtract 435 from 450 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 3528.655, with a leftover of 0.0015.