21372256 ÷ 158 
We want to figure out the number of times 21372256 can be divided by 158.

On to step 1:
158 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 158

Moving on to step 2:
158 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
If we take 0 away from 21, we end up with 21.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 158

Let's proceed to step 3:
158 can be fit into 213 1 times, resulting in a remainder of 55.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 158 from 213 and we're left with 55.
Include the next digit (7) from the dividend after 55, then repeat: 557 / 158

Going ahead to step 4:
The number 158 fits into 557 3 times, leaving a remainder of 83.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 474 away from 557, we end up with 83.
Take the next digit (2) from the dividend and append it to 83, then repeat: 832 / 158

Going ahead to step 5:
158 can be fit into 832 5 times, resulting in a remainder of 42.
The number 5 becomes the next digit in our result. 
Result so far: 135.0
The remainder is 42 after subtracting 790 from 832.
Include the next digit (2) from the dividend after 42, then repeat: 422 / 158

Going ahead to step 6:
If we divide 422 by 158, we get 2 and a remainder of 106.
The next digit of our result is 2. 
Result so far: 1352.0
Deduct 316 from 422 and we're left with 106.
Append the next digit (5) from the dividend to 106 and continue with: 1065 / 158

Moving on to step 7:
1065 divided by 158 is 6 with a remainder of 117.
Record the quotient 6 as the next digit in the result. 
Result so far: 13526.0
The remainder is 117 after subtracting 948 from 1065.
Take the next digit (6) from the dividend and append it to 117, then repeat: 1176 / 158

Let's proceed to step 8:
When dividing 1176 by 158, we get 7 with a remainder of 70.
Record the quotient 7 as the next digit in the result. 
Result so far: 135267.0
Subtracting 1106 from 1176 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 9:
158 goes into 700 4 times with a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 135267.4
Subtract 632 from 700 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 10:
680 divided by 158 is 4 with a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 135267.44
The remainder is 48 after subtracting 632 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The quotient of the division is 135267.44, and the remainder is 0.048.