Sarah wants to order a pizza with 2 different toppings. She has 9 different toppings to choose from. How many different pizzas could she order?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sarah wants to order a pizza with 2 different toppings. She has 9 different toppings to choose from. How many different pizzas could she order?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
36
Sarah wants to order a pizza with 2 different toppings. She has 9 different toppings to choose from. How many different pizzas could she order?
train