69120721 ÷ 450 
We're looking to find how many times 450 goes into 69120721.

Moving on to step 1:
When dividing 6 by 450, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 450

Going ahead to step 2:
If we divide 69 by 450, we get 0 and a remainder of 69.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 69, we end up with 69.
Grab the next digit (1) from the dividend, add it to 69, then carry on: 691 / 450

Advancing to step 3:
450 can be fit into 691 1 times, resulting in a remainder of 241.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 450 from 691 leaves us with 241.
Include the next digit (2) from the dividend after 241, then repeat: 2412 / 450

Advancing to step 4:
450 goes into 2412 5 times with a remainder of 162.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we take 2250 away from 2412, we end up with 162.
Grab the next digit (0) from the dividend, add it to 162, then carry on: 1620 / 450

Moving on to step 5:
1620 divided by 450 is 3 with a remainder of 270.
The number 3 becomes the next digit in our result. 
Result so far: 153.0
If we take 1350 away from 1620, we end up with 270.
Take the next digit (7) from the dividend and append it to 270, then repeat: 2707 / 450

Going ahead to step 6:
If we divide 2707 by 450, we get 6 and a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 1536.0
Deduct 2700 from 2707 and we're left with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 450

Step 7:
72 divided by 450 is 0 with a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 15360.0
Deduct 0 from 72 and we're left with 72.
Append the next digit (1) from the dividend to 72 and continue with: 721 / 450

On to step 8:
The number 450 fits into 721 1 times, leaving a remainder of 271.
Record the quotient 1 as the next digit in the result. 
Result so far: 153601.0
Deduct 450 from 721 and we're left with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Let's proceed to step 9:
The number 450 fits into 2710 6 times, leaving a remainder of 10.
The next digit of our result is 6. 
Result so far: 153601.6
Subtracting 2700 from 2710 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
450 can be fit into 100 0 times, resulting in a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 153601.6
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 11:
The number 450 fits into 1000 2 times, leaving a remainder of 100.
Record the quotient 2 as the next digit in the result. 
Result so far: 153601.602
The remainder is 100 after subtracting 900 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 12:
The number 450 fits into 1000 2 times, leaving a remainder of 100.
The next digit of our result is 2. 
Result so far: 153601.6022
Subtracting 900 from 1000 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 153601.6022, with a leftover of 0.001.