We're dividing 21508158 by 141 
We want to figure out the number of times 21508158 can be divided by 141.

Going ahead to step 1:
If we divide 2 by 141, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 141

Moving on to step 2:
21 divided by 141 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 141

Moving on to step 3:
141 can be fit into 215 1 times, resulting in a remainder of 74.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 141 away from 215, we end up with 74.
Take the next digit (0) from the dividend and append it to 74, then repeat: 740 / 141

Advancing to step 4:
141 can be fit into 740 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 15.0
The remainder is 35 after subtracting 705 from 740.
Bring next digit (8) of the dividend behind the 35 and repeat the process: 358 / 141

On to step 5:
141 goes into 358 2 times with a remainder of 76.
Record the quotient 2 as the next digit in the result. 
Result so far: 152.0
Deduct 282 from 358 and we're left with 76.
Append the next digit (1) from the dividend to 76 and continue with: 761 / 141

Moving on to step 6:
141 goes into 761 5 times with a remainder of 56.
Use 5 as the next digit of our solution. 
Result so far: 1525.0
If we subtract 705 from 761, we get 56.
Grab the next digit (5) from the dividend, add it to 56, then carry on: 565 / 141

On to step 7:
141 goes into 565 4 times with a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 15254.0
Deduct 564 from 565 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 141

Moving on to step 8:
The number 141 fits into 18 0 times, leaving a remainder of 18.
The next digit of our result is 0. 
Result so far: 152540.0
The remainder is 18 after subtracting 0 from 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 9:
141 goes into 180 1 times with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 152540.1
Subtracting 141 from 180 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 10:
390 divided by 141 is 2 with a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 152540.12
Subtracting 282 from 390 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 11:
When dividing 1080 by 141, we get 7 with a remainder of 93.
Use 7 as the next digit of our solution. 
Result so far: 152540.127
Subtracting 987 from 1080 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 12:
If we divide 930 by 141, we get 6 and a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 152540.1276
If we subtract 846 from 930, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 13:
If we divide 840 by 141, we get 5 and a remainder of 135.
Put 5 as the next digit of the answer. 
Result so far: 152540.12765
If we take 705 away from 840, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Moving on to step 14:
When dividing 1350 by 141, we get 9 with a remainder of 81.
Use 9 as the next digit of our solution. 
Result so far: 152540.127659
Deduct 1269 from 1350 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 15:
810 divided by 141 is 5 with a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 152540.1276595
If we take 705 away from 810, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Going ahead to step 16:
When dividing 1050 by 141, we get 7 with a remainder of 63.
Use 7 as the next digit of our solution. 
Result so far: 152540.12765957
The remainder is 63 after subtracting 987 from 1050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The quotient of the division is 152540.12765957, and the remainder is 6.3e-08.