We look at the division of 42166873 by 781 
Let's see how many times 781 fits into 42166873.

Advancing to step 1:
The number 781 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 781

Let's proceed to step 2:
781 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 781

Step 3:
781 can be fit into 421 0 times, resulting in a remainder of 421.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 421 leaves us with 421.
Take the next digit (6) from the dividend and append it to 421, then repeat: 4216 / 781

Moving on to step 4:
4216 divided by 781 is 5 with a remainder of 311.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 3905 from 4216, we get 311.
Append the next digit (6) from the dividend to 311 and continue with: 3116 / 781

Step 5:
781 goes into 3116 3 times with a remainder of 773.
Put 3 as the next digit of the answer. 
Result so far: 53.0
Subtracting 2343 from 3116 leaves us with 773.
Append the next digit (8) from the dividend to 773 and continue with: 7738 / 781

Moving on to step 6:
If we divide 7738 by 781, we get 9 and a remainder of 709.
Use 9 as the next digit of our solution. 
Result so far: 539.0
Subtracting 7029 from 7738 leaves us with 709.
Take the next digit (7) from the dividend and append it to 709, then repeat: 7097 / 781

Advancing to step 7:
781 can be fit into 7097 9 times, resulting in a remainder of 68.
The next digit of our result is 9. 
Result so far: 5399.0
Deduct 7029 from 7097 and we're left with 68.
Append the next digit (3) from the dividend to 68 and continue with: 683 / 781

Going ahead to step 8:
The number 781 fits into 683 0 times, leaving a remainder of 683.
Write down 0 as next digit of the result. 
Result so far: 53990.0
If we take 0 away from 683, we end up with 683.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6830, and continue the process.

Advancing to step 9:
781 can be fit into 6830 8 times, resulting in a remainder of 582.
Write down 8 as next digit of the result. 
Result so far: 53990.8
If we take 6248 away from 6830, we end up with 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Step 10:
When dividing 5820 by 781, we get 7 with a remainder of 353.
The number 7 becomes the next digit in our result. 
Result so far: 53990.87
Subtract 5467 from 5820 to get 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Let's proceed to step 11:
When dividing 3530 by 781, we get 4 with a remainder of 406.
The next digit of our result is 4. 
Result so far: 53990.874
If we take 3124 away from 3530, we end up with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Advancing to step 12:
781 goes into 4060 5 times with a remainder of 155.
Record the quotient 5 as the next digit in the result. 
Result so far: 53990.8745
The remainder is 155 after subtracting 3905 from 4060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 13:
When dividing 1550 by 781, we get 1 with a remainder of 769.
Use 1 as the next digit of our solution. 
Result so far: 53990.87451
Subtract 781 from 1550 to get 769.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7690, and continue the process.

Let's proceed to step 14:
781 goes into 7690 9 times with a remainder of 661.
Put 9 as the next digit of the answer. 
Result so far: 53990.874519
If we take 7029 away from 7690, we end up with 661.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6610, and continue the process.

Let's proceed to step 15:
6610 divided by 781 is 8 with a remainder of 362.
The number 8 becomes the next digit in our result. 
Result so far: 53990.8745198
The remainder is 362 after subtracting 6248 from 6610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Going ahead to step 16:
The number 781 fits into 3620 4 times, leaving a remainder of 496.
Put 4 as the next digit of the answer. 
Result so far: 53990.87451984
The remainder is 496 after subtracting 3124 from 3620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

After the division, we end up with 53990.87451984 and a remainder of 4.96e-07.