63961123 ÷ 849 
We want to figure out the number of times 63961123 can be divided by 849.

Advancing to step 1:
849 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 849

Moving on to step 2:
849 can be fit into 63 0 times, resulting in a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 849

Going ahead to step 3:
If we divide 639 by 849, we get 0 and a remainder of 639.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 639 and we're left with 639.
Grab the next digit (6) from the dividend, add it to 639, then carry on: 6396 / 849

Step 4:
849 goes into 6396 7 times with a remainder of 453.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 453 after subtracting 5943 from 6396.
Bring next digit (1) of the dividend behind the 453 and repeat the process: 4531 / 849

Advancing to step 5:
4531 divided by 849 is 5 with a remainder of 286.
Record the quotient 5 as the next digit in the result. 
Result so far: 75.0
The remainder is 286 after subtracting 4245 from 4531.
Append the next digit (1) from the dividend to 286 and continue with: 2861 / 849

Moving on to step 6:
The number 849 fits into 2861 3 times, leaving a remainder of 314.
The number 3 becomes the next digit in our result. 
Result so far: 753.0
If we subtract 2547 from 2861, we get 314.
Take the next digit (2) from the dividend and append it to 314, then repeat: 3142 / 849

On to step 7:
849 can be fit into 3142 3 times, resulting in a remainder of 595.
Write down 3 as next digit of the result. 
Result so far: 7533.0
The remainder is 595 after subtracting 2547 from 3142.
Bring next digit (3) of the dividend behind the 595 and repeat the process: 5953 / 849

Advancing to step 8:
When dividing 5953 by 849, we get 7 with a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 75337.0
Deduct 5943 from 5953 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
100 divided by 849 is 0 with a remainder of 100.
The next digit of our result is 0. 
Result so far: 75337.0
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 10:
849 goes into 1000 1 times with a remainder of 151.
Record the quotient 1 as the next digit in the result. 
Result so far: 75337.01
If we subtract 849 from 1000, we get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

On to step 11:
1510 divided by 849 is 1 with a remainder of 661.
Put 1 as the next digit of the answer. 
Result so far: 75337.011
If we take 849 away from 1510, 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.

In conclusion, the division gives 75337.011 with a balance of 0.0661.