21131851 divided by 388 
Our goal is to divide 21131851 by 388.

On to step 1:
If we divide 2 by 388, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 388

Going ahead to step 2:
388 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 388

Moving on to step 3:
The number 388 fits into 211 0 times, leaving a remainder of 211.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 211, we get 211.
Grab the next digit (3) from the dividend, add it to 211, then carry on: 2113 / 388

Advancing to step 4:
If we divide 2113 by 388, we get 5 and a remainder of 173.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 1940 from 2113 leaves us with 173.
Include the next digit (1) from the dividend after 173, then repeat: 1731 / 388

Step 5:
When dividing 1731 by 388, we get 4 with a remainder of 179.
Write down 4 as next digit of the result. 
Result so far: 54.0
Deduct 1552 from 1731 and we're left with 179.
Include the next digit (8) from the dividend after 179, then repeat: 1798 / 388

Going ahead to step 6:
388 can be fit into 1798 4 times, resulting in a remainder of 246.
The number 4 becomes the next digit in our result. 
Result so far: 544.0
If we take 1552 away from 1798, we end up with 246.
Bring next digit (5) of the dividend behind the 246 and repeat the process: 2465 / 388

Advancing to step 7:
The number 388 fits into 2465 6 times, leaving a remainder of 137.
Put 6 as the next digit of the answer. 
Result so far: 5446.0
Deduct 2328 from 2465 and we're left with 137.
Fetch the next digit (1) from the dividend, attach it to 137 and continue: 1371 / 388

Advancing to step 8:
If we divide 1371 by 388, we get 3 and a remainder of 207.
The number 3 becomes the next digit in our result. 
Result so far: 54463.0
If we subtract 1164 from 1371, we get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Step 9:
2070 divided by 388 is 5 with a remainder of 130.
Record the quotient 5 as the next digit in the result. 
Result so far: 54463.5
If we subtract 1940 from 2070, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 10:
1300 divided by 388 is 3 with a remainder of 136.
Put 3 as the next digit of the answer. 
Result so far: 54463.53
Deduct 1164 from 1300 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

On to step 11:
388 goes into 1360 3 times with a remainder of 196.
Use 3 as the next digit of our solution. 
Result so far: 54463.533
If we subtract 1164 from 1360, we get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

The final outcome is 54463.533, with a leftover of 0.0196.