Let's divide 21126984 by 350
We're looking to find how many times 350 goes into 21126984.

Advancing to step 1:
The number 350 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 350

Let's proceed to step 2:
21 divided by 350 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 350

Let's proceed to step 3:
If we divide 211 by 350, we get 0 and a remainder of 211.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 211, we end up with 211.
Bring next digit (2) of the dividend behind the 211 and repeat the process: 2112 / 350

Let's proceed to step 4:
350 can be fit into 2112 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 2100 from 2112 leaves us with 12.
Take the next digit (6) from the dividend and append it to 12, then repeat: 126 / 350

On to step 5:
126 divided by 350 is 0 with a remainder of 126.
Use 0 as the next digit of our solution. 
Result so far: 60.0
Subtract 0 from 126 to get 126.
Bring next digit (9) of the dividend behind the 126 and repeat the process: 1269 / 350

Moving on to step 6:
1269 divided by 350 is 3 with a remainder of 219.
Put 3 as the next digit of the answer. 
Result so far: 603.0
If we subtract 1050 from 1269, we get 219.
Append the next digit (8) from the dividend to 219 and continue with: 2198 / 350

Step 7:
350 goes into 2198 6 times with a remainder of 98.
Use 6 as the next digit of our solution. 
Result so far: 6036.0
Deduct 2100 from 2198 and we're left with 98.
Grab the next digit (4) from the dividend, add it to 98, then carry on: 984 / 350

Advancing to step 8:
The number 350 fits into 984 2 times, leaving a remainder of 284.
Use 2 as the next digit of our solution. 
Result so far: 60362.0
Subtract 700 from 984 to get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 9:
350 goes into 2840 8 times with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 60362.8
Deduct 2800 from 2840 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
350 goes into 400 1 times with a remainder of 50.
Put 1 as the next digit of the answer. 
Result so far: 60362.81
If we subtract 350 from 400, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 11:
The number 350 fits into 500 1 times, leaving a remainder of 150.
Use 1 as the next digit of our solution. 
Result so far: 60362.811
Deduct 350 from 500 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The final result is 60362.811 with a remainder of 0.015.