Let's divide 21376040 by 215
We're looking to find how many times 215 goes into 21376040.

Step 1:
215 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 215

Step 2:
215 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 215

On to step 3:
When dividing 213 by 215, we get 0 with a remainder of 213.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 213 leaves us with 213.
Bring next digit (7) of the dividend behind the 213 and repeat the process: 2137 / 215

On to step 4:
The number 215 fits into 2137 9 times, leaving a remainder of 202.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 1935 away from 2137, we end up with 202.
Bring next digit (6) of the dividend behind the 202 and repeat the process: 2026 / 215

Let's proceed to step 5:
2026 divided by 215 is 9 with a remainder of 91.
Write down 9 as next digit of the result. 
Result so far: 99.0
If we take 1935 away from 2026, we end up with 91.
Include the next digit (0) from the dividend after 91, then repeat: 910 / 215

Let's proceed to step 6:
The number 215 fits into 910 4 times, leaving a remainder of 50.
Write down 4 as next digit of the result. 
Result so far: 994.0
Subtract 860 from 910 to get 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 215

Step 7:
215 can be fit into 504 2 times, resulting in a remainder of 74.
Use 2 as the next digit of our solution. 
Result so far: 9942.0
Deduct 430 from 504 and we're left with 74.
Grab the next digit (0) from the dividend, add it to 74, then carry on: 740 / 215

On to step 8:
The number 215 fits into 740 3 times, leaving a remainder of 95.
Write down 3 as next digit of the result. 
Result so far: 99423.0
Subtracting 645 from 740 leaves us with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 9:
950 divided by 215 is 4 with a remainder of 90.
Use 4 as the next digit of our solution. 
Result so far: 99423.4
Subtract 860 from 950 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 10:
900 divided by 215 is 4 with a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 99423.44
The remainder is 40 after subtracting 860 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 99423.44 with a remainder of 0.04.