We're dividing 66501170 by 551 
Let's see how many times 551 fits into 66501170.

Going ahead to step 1:
551 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 551

Moving on to step 2:
551 can be fit into 66 0 times, resulting in a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (5) from the dividend, add it to 66, then carry on: 665 / 551

Going ahead to step 3:
665 divided by 551 is 1 with a remainder of 114.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 551 from 665 leaves us with 114.
Include the next digit (0) from the dividend after 114, then repeat: 1140 / 551

On to step 4:
551 can be fit into 1140 2 times, resulting in a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 1102 from 1140 and we're left with 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 551

Step 5:
If we divide 381 by 551, we get 0 and a remainder of 381.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
If we subtract 0 from 381, we get 381.
Grab the next digit (1) from the dividend, add it to 381, then carry on: 3811 / 551

On to step 6:
3811 divided by 551 is 6 with a remainder of 505.
Write down 6 as next digit of the result. 
Result so far: 1206.0
The remainder is 505 after subtracting 3306 from 3811.
Fetch the next digit (7) from the dividend, attach it to 505 and continue: 5057 / 551

Step 7:
5057 divided by 551 is 9 with a remainder of 98.
The next digit of our result is 9. 
Result so far: 12069.0
Deduct 4959 from 5057 and we're left with 98.
Bring next digit (0) of the dividend behind the 98 and repeat the process: 980 / 551

Let's proceed to step 8:
If we divide 980 by 551, we get 1 and a remainder of 429.
The next digit of our result is 1. 
Result so far: 120691.0
Subtract 551 from 980 to get 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

Let's proceed to step 9:
551 goes into 4290 7 times with a remainder of 433.
Use 7 as the next digit of our solution. 
Result so far: 120691.7
Subtract 3857 from 4290 to get 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Step 10:
If we divide 4330 by 551, we get 7 and a remainder of 473.
Put 7 as the next digit of the answer. 
Result so far: 120691.77
Deduct 3857 from 4330 and we're left with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

The final outcome is 120691.77, with a leftover of 0.473.