21538542 ÷ 377 
We want to figure out the number of times 21538542 can be divided by 377.

Let's proceed to step 1:
If we divide 2 by 377, we get 0 and 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 / 377

Step 2:
377 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
Subtract 0 from 21 to get 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 377

Going ahead to step 3:
The number 377 fits into 215 0 times, leaving a remainder of 215.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 215 after subtracting 0 from 215.
Take the next digit (3) from the dividend and append it to 215, then repeat: 2153 / 377

Moving on to step 4:
2153 divided by 377 is 5 with a remainder of 268.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 1885 from 2153, we get 268.
Bring next digit (8) of the dividend behind the 268 and repeat the process: 2688 / 377

Step 5:
377 can be fit into 2688 7 times, resulting in a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 57.0
If we take 2639 away from 2688, we end up with 49.
Append the next digit (5) from the dividend to 49 and continue with: 495 / 377

Step 6:
495 divided by 377 is 1 with a remainder of 118.
The number 1 becomes the next digit in our result. 
Result so far: 571.0
Subtract 377 from 495 to get 118.
Append the next digit (4) from the dividend to 118 and continue with: 1184 / 377

On to step 7:
1184 divided by 377 is 3 with a remainder of 53.
Write down 3 as next digit of the result. 
Result so far: 5713.0
The remainder is 53 after subtracting 1131 from 1184.
Grab the next digit (2) from the dividend, add it to 53, then carry on: 532 / 377

Going ahead to step 8:
377 can be fit into 532 1 times, resulting in a remainder of 155.
Use 1 as the next digit of our solution. 
Result so far: 57131.0
The remainder is 155 after subtracting 377 from 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 9:
377 goes into 1550 4 times with a remainder of 42.
Write down 4 as next digit of the result. 
Result so far: 57131.4
Subtract 1508 from 1550 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
420 divided by 377 is 1 with a remainder of 43.
Record the quotient 1 as the next digit in the result. 
Result so far: 57131.41
Subtracting 377 from 420 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 11:
If we divide 430 by 377, we get 1 and a remainder of 53.
The number 1 becomes the next digit in our result. 
Result so far: 57131.411
If we subtract 377 from 430, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Our division results in 57131.411 with a remaining 0.0053.