53866994 divided by 300 
Our goal is to divide 53866994 by 300.

Step 1:
If we divide 5 by 300, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 300

Advancing to step 2:
53 divided by 300 is 0 with a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Include the next digit (8) from the dividend after 53, then repeat: 538 / 300

On to step 3:
300 can be fit into 538 1 times, resulting in a remainder of 238.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 300 away from 538, we end up with 238.
Take the next digit (6) from the dividend and append it to 238, then repeat: 2386 / 300

Step 4:
300 can be fit into 2386 7 times, resulting in a remainder of 286.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we take 2100 away from 2386, we end up with 286.
Bring next digit (6) of the dividend behind the 286 and repeat the process: 2866 / 300

Advancing to step 5:
If we divide 2866 by 300, we get 9 and a remainder of 166.
Put 9 as the next digit of the answer. 
Result so far: 179.0
Subtract 2700 from 2866 to get 166.
Append the next digit (9) from the dividend to 166 and continue with: 1669 / 300

Step 6:
300 can be fit into 1669 5 times, resulting in a remainder of 169.
Put 5 as the next digit of the answer. 
Result so far: 1795.0
Subtract 1500 from 1669 to get 169.
Append the next digit (9) from the dividend to 169 and continue with: 1699 / 300

Step 7:
1699 divided by 300 is 5 with a remainder of 199.
The number 5 becomes the next digit in our result. 
Result so far: 17955.0
Deduct 1500 from 1699 and we're left with 199.
Append the next digit (4) from the dividend to 199 and continue with: 1994 / 300

Let's proceed to step 8:
If we divide 1994 by 300, we get 6 and a remainder of 194.
Put 6 as the next digit of the answer. 
Result so far: 179556.0
The remainder is 194 after subtracting 1800 from 1994.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Let's proceed to step 9:
1940 divided by 300 is 6 with a remainder of 140.
Write down 6 as next digit of the result. 
Result so far: 179556.6
Subtract 1800 from 1940 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 10:
When dividing 1400 by 300, we get 4 with a remainder of 200.
Record the quotient 4 as the next digit in the result. 
Result so far: 179556.64
Subtracting 1200 from 1400 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 11:
300 goes into 2000 6 times with a remainder of 200.
The number 6 becomes the next digit in our result. 
Result so far: 179556.646
If we subtract 1800 from 2000, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
When dividing 2000 by 300, we get 6 with a remainder of 200.
The number 6 becomes the next digit in our result. 
Result so far: 179556.6466
The remainder is 200 after subtracting 1800 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 179556.6466, with a leftover of 0.002.