We look at the division of 21272831 by 378 
Let's see how many times 378 fits into 21272831.

Going ahead to step 1:
The number 378 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 378

Moving on to step 2:
378 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 378

Advancing to step 3:
378 goes into 212 0 times with a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 212 to get 212.
Grab the next digit (7) from the dividend, add it to 212, then carry on: 2127 / 378

On to step 4:
When dividing 2127 by 378, we get 5 with a remainder of 237.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 237 after subtracting 1890 from 2127.
Append the next digit (2) from the dividend to 237 and continue with: 2372 / 378

Advancing to step 5:
When dividing 2372 by 378, we get 6 with a remainder of 104.
Record the quotient 6 as the next digit in the result. 
Result so far: 56.0
If we take 2268 away from 2372, we end up with 104.
Fetch the next digit (8) from the dividend, attach it to 104 and continue: 1048 / 378

Advancing to step 6:
The number 378 fits into 1048 2 times, leaving a remainder of 292.
Use 2 as the next digit of our solution. 
Result so far: 562.0
Subtracting 756 from 1048 leaves us with 292.
Append the next digit (3) from the dividend to 292 and continue with: 2923 / 378

Advancing to step 7:
The number 378 fits into 2923 7 times, leaving a remainder of 277.
The next digit of our result is 7. 
Result so far: 5627.0
Subtract 2646 from 2923 to get 277.
Append the next digit (1) from the dividend to 277 and continue with: 2771 / 378

On to step 8:
378 goes into 2771 7 times with a remainder of 125.
The number 7 becomes the next digit in our result. 
Result so far: 56277.0
If we take 2646 away from 2771, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 9:
378 goes into 1250 3 times with a remainder of 116.
Record the quotient 3 as the next digit in the result. 
Result so far: 56277.3
Subtract 1134 from 1250 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Moving on to step 10:
When dividing 1160 by 378, we get 3 with a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 56277.33
Deduct 1134 from 1160 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

After the division, we end up with 56277.33 and a remainder of 0.026.