Решение задач: Написание новых примеров по образцу

Пример 1:
Образец:
```python
x = 5
y = 10
z = x + y
print(z)
```
Новый пример:
```python
a = 7
b = 3
c = a * b
print(c)
```

Пример 2:
Образец:
```python
name = "Alice"
age = 25
print("My name is " + name + " and I am " + str(age) + " years old.")
```
Новый пример:
```python
animal = "dog"
color = "brown"
print("I have a " + color + " " + animal + ".")
```

Пример 3:
Образец:
```python
num1 = 10
num2 = 3
result = num1 / num2
print(result)
```
Новый пример:
```python
num_a = 20
num_b = 5
res = num_a ** num_b
print(res)
```

Пример 4:
Образец:
```python
x = 15
if x > 10:
print("x is greater than 10")
else:
print("x is less than or equal to 10")
```
Новый пример:
```python
number = 8
if number % 2 == 0:
print("The number is even.")
else:
print("The number is odd.")
```