21016939 ÷ 538 
We're looking to find how many times 538 goes into 21016939.

Step 1:
538 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 538

Advancing to step 2:
If we divide 21 by 538, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 538

Step 3:
The number 538 fits into 210 0 times, leaving a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Fetch the next digit (1) from the dividend, attach it to 210 and continue: 2101 / 538

Step 4:
538 can be fit into 2101 3 times, resulting in a remainder of 487.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 1614 away from 2101, we end up with 487.
Include the next digit (6) from the dividend after 487, then repeat: 4876 / 538

Step 5:
If we divide 4876 by 538, we get 9 and a remainder of 34.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtract 4842 from 4876 to get 34.
Append the next digit (9) from the dividend to 34 and continue with: 349 / 538

Let's proceed to step 6:
538 can be fit into 349 0 times, resulting in a remainder of 349.
The next digit of our result is 0. 
Result so far: 390.0
The remainder is 349 after subtracting 0 from 349.
Bring next digit (3) of the dividend behind the 349 and repeat the process: 3493 / 538

Let's proceed to step 7:
538 goes into 3493 6 times with a remainder of 265.
Record the quotient 6 as the next digit in the result. 
Result so far: 3906.0
Subtracting 3228 from 3493 leaves us with 265.
Take the next digit (9) from the dividend and append it to 265, then repeat: 2659 / 538

Let's proceed to step 8:
538 goes into 2659 4 times with a remainder of 507.
Put 4 as the next digit of the answer. 
Result so far: 39064.0
If we subtract 2152 from 2659, we get 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Advancing to step 9:
538 goes into 5070 9 times with a remainder of 228.
The number 9 becomes the next digit in our result. 
Result so far: 39064.9
If we take 4842 away from 5070, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 10:
If we divide 2280 by 538, we get 4 and a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 39064.94
The remainder is 128 after subtracting 2152 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 11:
538 can be fit into 1280 2 times, resulting in a remainder of 204.
Record the quotient 2 as the next digit in the result. 
Result so far: 39064.942
If we subtract 1076 from 1280, we get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Moving on to step 12:
The number 538 fits into 2040 3 times, leaving a remainder of 426.
Write down 3 as next digit of the result. 
Result so far: 39064.9423
Subtracting 1614 from 2040 leaves us with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Step 13:
If we divide 4260 by 538, we get 7 and a remainder of 494.
Put 7 as the next digit of the answer. 
Result so far: 39064.94237
Subtracting 3766 from 4260 leaves us with 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

Step 14:
The number 538 fits into 4940 9 times, leaving a remainder of 98.
Put 9 as the next digit of the answer. 
Result so far: 39064.942379
Subtract 4842 from 4940 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 15:
538 goes into 980 1 times with a remainder of 442.
Use 1 as the next digit of our solution. 
Result so far: 39064.9423791
Deduct 538 from 980 and we're left with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Step 16:
538 can be fit into 4420 8 times, resulting in a remainder of 116.
Use 8 as the next digit of our solution. 
Result so far: 39064.94237918
Subtract 4304 from 4420 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.

The quotient of the division is 39064.94237918, and the remainder is 1.16e-07.