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We can use Python as a quick and handy calculator. We can perform all the basic four operations  addition, subtraction, multiplication, and division in Python.
Examples
To add 4 and 2, use +
+
4 + 2
It returns 6
6
To subtract 2 from 4, use 

4  2
It returns 2
2
To multiply 4 and 2, use *
*
4 * 2
It returns 8
8
To divide two integers 5 by 2, use / to get the complete value and // to get the integer value
/
//
5 // 2
5 / 2
It returns 2.5
2.5
Every line of the code is called expression.
expression
4 + 2 is one expression and 4  2 is another expression.
Run above expressions in the Jupyter notebook on the righthand side and make yourself comfortable with addition, subtraction, multiplication, and division in Python. Remember to execute the cell in the notebook, press Shift + Enter
Shift + Enter
Peter is driving a car at a speed of 25 kilometers per hour. Calculate the distance covered by him in 4 hours
The formula of distance is
distance = speed * time
Here speed is 25 and time is 4
25
4
Multiply 25 and 4 on the righthand side and execute it
Fill in the result of your calculation in the question below
Question 
Distance covered by Peter in 4 hours is
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