21994 ÷ 5 = 4398 R4
Let's divide 21994 by 5.

Step 1:
5 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 5

Step 2:
5 goes into 21 4 times with a remainder of 1.
Write down 4 as next digit of of the result. 
Result so far: 4
Subtract 20 from 21 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 5

Step 3:
5 goes into 19 3 times with a remainder of 4.
Write down 3 as next digit of of the result. 
Result so far: 43
Subtract 15 from 19 to get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 5

Step 4:
5 goes into 49 9 times with a remainder of 4.
Write down 9 as next digit of of the result. 
Result so far: 439
Subtract 45 from 49 to get 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 5

Step 5:
5 goes into 44 8 times with a remainder of 4.
Write down 8 as next digit of of the result. 
Result so far: 4398
Subtract 40 from 44 to get 4.

The final result is 4398 with a remainder of 4.