*****
Task: The sum of two numbers
Code:
x = int(input())
y = int(input())
print(x+y)
*****
Task: Find the preceding and the next number
Code:
print("Please, enter the number")
x = int(input())
print("The next number for", x, "is", x+1,".")
print("The previous number for", x, "is", x-1,".")
*****
Task: Convert the number into a three-digit number.
Code:
def digits ():
    print("Please, enter three-digit number")
    x = int(input())
    if (x<1000):
        print("*****")
        print("*",f'{x:03}',"*",sep='')#f'{x:03}' -add zeros. sep='' -remove spaces
        print("*****")
        print("Thank you!")
    else:
        print("Sorry, three-digits maximum")
        digits()
digits()
*****
Task: Create table 3x3 from 9 numbers
Code:
a = int(input('First number?: '))
b = int(input('Second number?: '))
c = int(input('Third number?: '))
d = int(input('Forth number?: '))
e = int(input('Fifth number?: '))
f = int(input('Sixth number?: '))
g = int(input('Seventh number?: '))
h = int(input('Eighth number?: '))
i = int(input('Ninth number?: '))

print("|",f'{a:7}',"|",f'{b:7}',"|",f'{c:7}',"|",sep='')  
print("|",f'{d:7}',"|",f'{e:7}',"|",f'{f:7}',"|",sep='')
print("|",f'{g:7}',"|",f'{h:7}',"|",f'{i:7}',"|",sep='')
*****
Task: Divide two numbers
Code:
K = int(input('K?: '))
N = int(input('N?: '))

print(int(K/N))
*****
Task: Calculate the number of the bags with vegetables.
Code:
while True:
    M = int(input('Potato(kg)?: '))
    if M%20 == 0 and 0