We look at the division of 53985002 by 669 
We want to divide 53985002 by 669.

Let's proceed to step 1:
If we divide 5 by 669, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 669

Moving on to step 2:
When dividing 53 by 669, we get 0 with a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 669

Moving on to step 3:
When dividing 539 by 669, we get 0 with a remainder of 539.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 539 to get 539.
Bring next digit (8) of the dividend behind the 539 and repeat the process: 5398 / 669

Step 4:
669 can be fit into 5398 8 times, resulting in a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 5352 from 5398 leaves us with 46.
Bring next digit (5) of the dividend behind the 46 and repeat the process: 465 / 669

Moving on to step 5:
669 goes into 465 0 times with a remainder of 465.
Use 0 as the next digit of our solution. 
Result so far: 80.0
Subtract 0 from 465 to get 465.
Bring next digit (0) of the dividend behind the 465 and repeat the process: 4650 / 669

Advancing to step 6:
If we divide 4650 by 669, we get 6 and a remainder of 636.
The next digit of our result is 6. 
Result so far: 806.0
Subtract 4014 from 4650 to get 636.
Grab the next digit (0) from the dividend, add it to 636, then carry on: 6360 / 669

Step 7:
When dividing 6360 by 669, we get 9 with a remainder of 339.
The next digit of our result is 9. 
Result so far: 8069.0
Subtract 6021 from 6360 to get 339.
Fetch the next digit (2) from the dividend, attach it to 339 and continue: 3392 / 669

Moving on to step 8:
3392 divided by 669 is 5 with a remainder of 47.
Write down 5 as next digit of the result. 
Result so far: 80695.0
Deduct 3345 from 3392 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 9:
If we divide 470 by 669, we get 0 and a remainder of 470.
The next digit of our result is 0. 
Result so far: 80695.0
If we take 0 away from 470, we end up with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

On to step 10:
669 can be fit into 4700 7 times, resulting in a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 80695.07
Subtract 4683 from 4700 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
The number 669 fits into 170 0 times, leaving a remainder of 170.
Write down 0 as next digit of the result. 
Result so far: 80695.07
The remainder is 170 after subtracting 0 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 12:
When dividing 1700 by 669, we get 2 with a remainder of 362.
Write down 2 as next digit of the result. 
Result so far: 80695.0702
If we take 1338 away from 1700, we end up with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Let's proceed to step 13:
When dividing 3620 by 669, we get 5 with a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 80695.07025
If we take 3345 away from 3620, we end up with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Step 14:
If we divide 2750 by 669, we get 4 and a remainder of 74.
Record the quotient 4 as the next digit in the result. 
Result so far: 80695.070254
If we take 2676 away from 2750, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 15:
When dividing 740 by 669, we get 1 with a remainder of 71.
The next digit of our result is 1. 
Result so far: 80695.0702541
Subtracting 669 from 740 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 16:
When dividing 710 by 669, we get 1 with a remainder of 41.
The next digit of our result is 1. 
Result so far: 80695.07025411
If we take 669 away from 710, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

The final result is 80695.07025411 with a remainder of 4.1e-08.