21377371 ÷ 153 
We're looking to find how many times 153 goes into 21377371.

Going ahead to step 1:
The number 153 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 153

Let's proceed to step 2:
If we divide 21 by 153, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 153

Moving on to step 3:
The number 153 fits into 213 1 times, leaving a remainder of 60.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 60 after subtracting 153 from 213.
Bring next digit (7) of the dividend behind the 60 and repeat the process: 607 / 153

On to step 4:
If we divide 607 by 153, we get 3 and a remainder of 148.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 459 from 607 leaves us with 148.
Fetch the next digit (7) from the dividend, attach it to 148 and continue: 1487 / 153

Moving on to step 5:
The number 153 fits into 1487 9 times, leaving a remainder of 110.
The number 9 becomes the next digit in our result. 
Result so far: 139.0
If we take 1377 away from 1487, we end up with 110.
Append the next digit (3) from the dividend to 110 and continue with: 1103 / 153

Let's proceed to step 6:
If we divide 1103 by 153, we get 7 and a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 1397.0
Subtracting 1071 from 1103 leaves us with 32.
Fetch the next digit (7) from the dividend, attach it to 32 and continue: 327 / 153

Advancing to step 7:
When dividing 327 by 153, we get 2 with a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 13972.0
Subtract 306 from 327 to get 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 153

Step 8:
211 divided by 153 is 1 with a remainder of 58.
Record the quotient 1 as the next digit in the result. 
Result so far: 139721.0
If we subtract 153 from 211, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 9:
The number 153 fits into 580 3 times, leaving a remainder of 121.
Write down 3 as next digit of the result. 
Result so far: 139721.3
If we take 459 away from 580, we end up with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Moving on to step 10:
1210 divided by 153 is 7 with a remainder of 139.
The next digit of our result is 7. 
Result so far: 139721.37
Subtracting 1071 from 1210 leaves us with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Step 11:
When dividing 1390 by 153, we get 9 with a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 139721.379
Subtract 1377 from 1390 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
130 divided by 153 is 0 with a remainder of 130.
The next digit of our result is 0. 
Result so far: 139721.379
The remainder is 130 after subtracting 0 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 13:
153 can be fit into 1300 8 times, resulting in a remainder of 76.
Use 8 as the next digit of our solution. 
Result so far: 139721.37908
Subtract 1224 from 1300 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 14:
The number 153 fits into 760 4 times, leaving a remainder of 148.
Put 4 as the next digit of the answer. 
Result so far: 139721.379084
If we subtract 612 from 760, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Going ahead to step 15:
153 goes into 1480 9 times with a remainder of 103.
The number 9 becomes the next digit in our result. 
Result so far: 139721.3790849
If we subtract 1377 from 1480, we get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 16:
153 goes into 1030 6 times with a remainder of 112.
Put 6 as the next digit of the answer. 
Result so far: 139721.37908496
Subtracting 918 from 1030 leaves us with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The final result is 139721.37908496 with a remainder of 1.12e-07.