2139981 ÷ 450 
We're looking to find how many times 450 goes into 2139981.

Let's proceed to step 1:
450 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 450

On to step 2:
When dividing 21 by 450, we get 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.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 450

Step 3:
450 can be fit into 213 0 times, resulting in a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 213 leaves us with 213.
Grab the next digit (9) from the dividend, add it to 213, then carry on: 2139 / 450

Moving on to step 4:
When dividing 2139 by 450, we get 4 with a remainder of 339.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 1800 from 2139 leaves us with 339.
Fetch the next digit (9) from the dividend, attach it to 339 and continue: 3399 / 450

Step 5:
450 can be fit into 3399 7 times, resulting in a remainder of 249.
Put 7 as the next digit of the answer. 
Result so far: 47.0
Subtracting 3150 from 3399 leaves us with 249.
Fetch the next digit (8) from the dividend, attach it to 249 and continue: 2498 / 450

On to step 6:
2498 divided by 450 is 5 with a remainder of 248.
Put 5 as the next digit of the answer. 
Result so far: 475.0
If we subtract 2250 from 2498, we get 248.
Bring next digit (1) of the dividend behind the 248 and repeat the process: 2481 / 450

Let's proceed to step 7:
2481 divided by 450 is 5 with a remainder of 231.
Put 5 as the next digit of the answer. 
Result so far: 4755.0
The remainder is 231 after subtracting 2250 from 2481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Let's proceed to step 8:
2310 divided by 450 is 5 with a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 4755.5
Subtract 2250 from 2310 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
450 can be fit into 600 1 times, resulting in a remainder of 150.
Put 1 as the next digit of the answer. 
Result so far: 4755.51
Subtract 450 from 600 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 10:
If we divide 1500 by 450, we get 3 and a remainder of 150.
The number 3 becomes the next digit in our result. 
Result so far: 4755.513
If we take 1350 away from 1500, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 11:
If we divide 1500 by 450, we get 3 and a remainder of 150.
The number 3 becomes the next digit in our result. 
Result so far: 4755.5133
If we take 1350 away from 1500, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

After the division, we end up with 4755.5133 and a remainder of 0.0015.