21540180 ÷ 842 
We're looking to find how many times 842 goes into 21540180.

Step 1:
If we divide 2 by 842, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 842

On to step 2:
When dividing 21 by 842, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 842

Step 3:
The number 842 fits into 215 0 times, leaving a remainder of 215.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 215, we end up with 215.
Grab the next digit (4) from the dividend, add it to 215, then carry on: 2154 / 842

Advancing to step 4:
The number 842 fits into 2154 2 times, leaving a remainder of 470.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1684 from 2154 to get 470.
Append the next digit (0) from the dividend to 470 and continue with: 4700 / 842

Going ahead to step 5:
If we divide 4700 by 842, we get 5 and a remainder of 490.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Deduct 4210 from 4700 and we're left with 490.
Bring next digit (1) of the dividend behind the 490 and repeat the process: 4901 / 842

Let's proceed to step 6:
842 goes into 4901 5 times with a remainder of 691.
The next digit of our result is 5. 
Result so far: 255.0
Subtract 4210 from 4901 to get 691.
Append the next digit (8) from the dividend to 691 and continue with: 6918 / 842

Step 7:
The number 842 fits into 6918 8 times, leaving a remainder of 182.
Record the quotient 8 as the next digit in the result. 
Result so far: 2558.0
If we take 6736 away from 6918, we end up with 182.
Append the next digit (0) from the dividend to 182 and continue with: 1820 / 842

Going ahead to step 8:
When dividing 1820 by 842, we get 2 with a remainder of 136.
Record the quotient 2 as the next digit in the result. 
Result so far: 25582.0
The remainder is 136 after subtracting 1684 from 1820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 9:
The number 842 fits into 1360 1 times, leaving a remainder of 518.
Put 1 as the next digit of the answer. 
Result so far: 25582.1
The remainder is 518 after subtracting 842 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Going ahead to step 10:
5180 divided by 842 is 6 with a remainder of 128.
The next digit of our result is 6. 
Result so far: 25582.16
If we take 5052 away from 5180, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Let's proceed to step 11:
If we divide 1280 by 842, we get 1 and a remainder of 438.
Put 1 as the next digit of the answer. 
Result so far: 25582.161
The remainder is 438 after subtracting 842 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Advancing to step 12:
The number 842 fits into 4380 5 times, leaving a remainder of 170.
Write down 5 as next digit of the result. 
Result so far: 25582.1615
If we subtract 4210 from 4380, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 13:
842 can be fit into 1700 2 times, resulting in a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 25582.16152
If we subtract 1684 from 1700, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
The number 842 fits into 160 0 times, leaving a remainder of 160.
Write down 0 as next digit of the result. 
Result so far: 25582.16152
If we subtract 0 from 160, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 15:
1600 divided by 842 is 1 with a remainder of 758.
The number 1 becomes the next digit in our result. 
Result so far: 25582.1615201
The remainder is 758 after subtracting 842 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7580, and continue the process.

Moving on to step 16:
When dividing 7580 by 842, we get 9 with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 25582.16152019
If we subtract 7578 from 7580, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 25582.16152019 with a remaining 2e-09.