user: I'm trying to understand my chances in a game with a 30% win probability per round. Can you calculate the probability of winning exactly 3 out of 10 rounds, 5 out of 15 rounds, and 7 out of 20 rounds?

Available functions:
name: calc_binomial_probability
description: Calculates the probability of getting k successes in n trials.
parameters: type: dict
properties: n: type: integer
description: The number of trials.
k: type: integer
description: The number of successes.
p: type: float
description: The probability of success.
required: n
k
p