51394986 divided by 215 
Let's see how many times 215 fits into 51394986.

Going ahead to step 1:
5 divided by 215 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 215

Let's proceed to step 2:
51 divided by 215 is 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (3) from the dividend to 51 and continue with: 513 / 215

Moving on to step 3:
215 can be fit into 513 2 times, resulting in a remainder of 83.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 430 away from 513, we end up with 83.
Include the next digit (9) from the dividend after 83, then repeat: 839 / 215

Moving on to step 4:
839 divided by 215 is 3 with a remainder of 194.
The next digit of our result is 3. 
Result so far: 23.0
The remainder is 194 after subtracting 645 from 839.
Grab the next digit (4) from the dividend, add it to 194, then carry on: 1944 / 215

Step 5:
If we divide 1944 by 215, we get 9 and a remainder of 9.
The next digit of our result is 9. 
Result so far: 239.0
If we take 1935 away from 1944, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 215

Moving on to step 6:
If we divide 99 by 215, we get 0 and a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 2390.0
Subtracting 0 from 99 leaves us with 99.
Include the next digit (8) from the dividend after 99, then repeat: 998 / 215

Let's proceed to step 7:
The number 215 fits into 998 4 times, leaving a remainder of 138.
Use 4 as the next digit of our solution. 
Result so far: 23904.0
The remainder is 138 after subtracting 860 from 998.
Take the next digit (6) from the dividend and append it to 138, then repeat: 1386 / 215

Step 8:
If we divide 1386 by 215, we get 6 and a remainder of 96.
The number 6 becomes the next digit in our result. 
Result so far: 239046.0
If we take 1290 away from 1386, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Going ahead to step 9:
When dividing 960 by 215, we get 4 with a remainder of 100.
Use 4 as the next digit of our solution. 
Result so far: 239046.4
Subtracting 860 from 960 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 10:
When dividing 1000 by 215, we get 4 with a remainder of 140.
The next digit of our result is 4. 
Result so far: 239046.44
The remainder is 140 after subtracting 860 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Our division results in 239046.44 with a remaining 0.14.