We divide 51366488 by 3
Let's see how many times 3 fits into 51366488.

Advancing to step 1:
5 divided by 3 is 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 3 from 5 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 3

On to step 2:
21 divided by 3 is 7 with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we subtract 21 from 21, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 3

Going ahead to step 3:
3 divided by 3 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
Subtract 3 from 3 to get 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 3

Step 4:
When dividing 6 by 3, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 1712.0
If we subtract 6 from 6, we get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 3

Let's proceed to step 5:
6 divided by 3 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 17122.0
If we take 6 away from 6, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 3

Advancing to step 6:
The number 3 fits into 4 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 171221.0
The remainder is 1 after subtracting 3 from 4.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 3

Advancing to step 7:
18 divided by 3 is 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 1712216.0
If we subtract 18 from 18, we get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 3

Let's proceed to step 8:
The number 3 fits into 8 2 times, leaving a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 17122162.0
Subtract 6 from 8 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
If we divide 20 by 3, we get 6 and a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 17122162.6
If we take 18 away from 20, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 10:
The number 3 fits into 20 6 times, leaving a remainder of 2.
The next digit of our result is 6. 
Result so far: 17122162.66
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 17122162.66 with a remaining 0.002.