First draw the division sign.
Next right the numbers you're dividing with. The 7 would be the divisor and the 147 would be the dividend.
Next you see how many times 7 can go into 14. Since it goes in 2 times you put the 2 over the 4 because you divided into 14 not 1.
Subtract your answer from 14. In this case your answer is 14 so when you subtract your answer will be 0.
Next you bring down the 7. Write it next to the 0.
Divide the brought down 7 into the devisor 7. Put your answer above the problem where the 2 is.
Multiply the divisor 7 by the 1. Then put the answer (7) under the brought down 7.
Then subtract the 7 from the 7. In this case what ever your answer is it would be the remainder. But since the answer is 0 there wouldn't be a remainder.
This is what you just did!
Now you know how to do long division!!