Let's divide 376887 by 90
We want to divide 376887 by 90.

On to step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 90

Going ahead to step 2:
The number 90 fits into 37 0 times, leaving a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 37 to get 37.
Append the next digit (6) from the dividend to 37 and continue with: 376 / 90

On to step 3:
The number 90 fits into 376 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 360 from 376 and we're left with 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 90

Moving on to step 4:
If we divide 168 by 90, we get 1 and a remainder of 78.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
Subtracting 90 from 168 leaves us with 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 90

Going ahead to step 5:
90 goes into 788 8 times with a remainder of 68.
Write down 8 as next digit of the result. 
Result so far: 418.0
If we take 720 away from 788, we end up with 68.
Append the next digit (7) from the dividend to 68 and continue with: 687 / 90

Moving on to step 6:
90 goes into 687 7 times with a remainder of 57.
Use 7 as the next digit of our solution. 
Result so far: 4187.0
The remainder is 57 after subtracting 630 from 687.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 7:
When dividing 570 by 90, we get 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 4187.6
Subtract 540 from 570 to 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.

Step 8:
90 can be fit into 300 3 times, resulting in a remainder of 30.
The next digit of our result is 3. 
Result so far: 4187.63
If we take 270 away from 300, we end up 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 9:
90 can be fit into 300 3 times, resulting in a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 4187.633
Subtract 270 from 300 to 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.

The final outcome is 4187.633, with a leftover of 0.003.