78902 ÷ 7 = 11271 R5
Let's divide 78902 by 7.

Step 1:
7 goes into 7 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 7 from 7 to get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 7

Step 2:
7 goes into 8 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 11
Subtract 7 from 8 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 7

Step 3:
7 goes into 19 2 times with a remainder of 5.
Write down 2 as next digit of of the result. 
Result so far: 112
Subtract 14 from 19 to get 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 7

Step 4:
7 goes into 50 7 times with a remainder of 1.
Write down 7 as next digit of of the result. 
Result so far: 1127
Subtract 49 from 50 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 7

Step 5:
7 goes into 12 1 times with a remainder of 5.
Write down 1 as next digit of of the result. 
Result so far: 11271
Subtract 7 from 12 to get 5.

The final result is 11271 with a remainder of 5.