Today just some samples of basic operation and their output on the shell.
print(type(1)) # class "int"
print(type(2.45)) # class "float"
#ADDITION
print(2 + 3.5) # 5.5 <-- int gets converted to float auto
number = 5
number += 4 # 9 <-- number = number + 4
print(number)
print(.4+.01) # 0.4100000000003 <-- float will have some rounding error
#SUBSTRACTION
print(2 - 3.5) # -1.5
#MULTIPLICATION
print(6 * 2) # 12
print(6 * .25) # 1.5
print(4.5 * 2.3) # 10.35
#DIVISION
print(12 / 4) # 3
print(3 / 4) # 0.75 <-- output is a float
print(3 // 6) # 0 integer division
#MODULO
print(4 % 3) # 1
print(3 % 2) # 1 <-- odd number
print(6 % 3) # 0 <-- even number
#POWER
print(4 ** 2) # 16
print(4 ** 6) # 4096
#ORDER OF OPERATION
print(3 + 6 * 2) # 15 <-- * and / before + and -
print((3 + 6) * 2) # 18 <-- paranthesises come before * and /
print(((3 / 2) + 6 * .5) * 2) # 9.0