Help me in solving PYTH32 problem

My issue

what should we use as value for ‘cost’ variable

My code

# Update your code below this line
s = 14
area = 4*s
cost = 

Learning course: Learn Python
Problem Link: CodeChef: Practical coding for everyone

Here in this code, we are firstly calculating the area of the square which is ( sideside) as it is given s=14 we are calculating (1414) as the area.
Next, in the question they have given cost of 7$/cm which means it charges 7$ for every centimeter.
So, we know that our area is 1414 =196
Now, we are multiplying are with the cost/cm (7$ with area) to get total cost of painting for that area.

as given in the question Cost=7* area