21515618 divided by 154 
Our goal is to divide 21515618 by 154.

Moving on to step 1:
The number 154 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 154

Step 2:
The number 154 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 154

Advancing to step 3:
154 goes into 215 1 times with a remainder of 61.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 61 after subtracting 154 from 215.
Append the next digit (1) from the dividend to 61 and continue with: 611 / 154

Advancing to step 4:
If we divide 611 by 154, we get 3 and a remainder of 149.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 149 after subtracting 462 from 611.
Fetch the next digit (5) from the dividend, attach it to 149 and continue: 1495 / 154

Moving on to step 5:
1495 divided by 154 is 9 with a remainder of 109.
Record the quotient 9 as the next digit in the result. 
Result so far: 139.0
If we subtract 1386 from 1495, we get 109.
Fetch the next digit (6) from the dividend, attach it to 109 and continue: 1096 / 154

Advancing to step 6:
154 goes into 1096 7 times with a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 1397.0
If we take 1078 away from 1096, we end up with 18.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 154

Going ahead to step 7:
181 divided by 154 is 1 with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 13971.0
Deduct 154 from 181 and we're left with 27.
Append the next digit (8) from the dividend to 27 and continue with: 278 / 154

Let's proceed to step 8:
If we divide 278 by 154, we get 1 and a remainder of 124.
Use 1 as the next digit of our solution. 
Result so far: 139711.0
Subtracting 154 from 278 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 9:
When dividing 1240 by 154, we get 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 139711.8
Deduct 1232 from 1240 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
154 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 139711.8
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 11:
The number 154 fits into 800 5 times, leaving a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 139711.805
Subtracting 770 from 800 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 12:
154 goes into 300 1 times with a remainder of 146.
The next digit of our result is 1. 
Result so far: 139711.8051
Subtracting 154 from 300 leaves us with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Advancing to step 13:
154 goes into 1460 9 times with a remainder of 74.
Put 9 as the next digit of the answer. 
Result so far: 139711.80519
The remainder is 74 after subtracting 1386 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 14:
740 divided by 154 is 4 with a remainder of 124.
The next digit of our result is 4. 
Result so far: 139711.805194
Subtract 616 from 740 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Going ahead to step 15:
If we divide 1240 by 154, we get 8 and a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 139711.8051948
Subtracting 1232 from 1240 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 16:
80 divided by 154 is 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 139711.8051948
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 139711.8051948 with a remaining 8e-08.