## A Multiplication Problem

Points: 100
Time limit: 1.0s
Memory limit: 256M

Problem type

You are with your favorite math professor, explaining how hard it is to do multiplication in your head. Luckily, you are smart enough to write a program to automate this for you.

Your task is simple, write a program that verifies if the multiplication of two given numbers $$A * B$$ is larger or equal to $$C$$.

#### Input Specification

First and only line contains 3 integers $$0 \leq A, B, C \leq 10^{18}$$.

#### Output Specification

Print $$Yes$$ if the multiplication of $$A$$ and $$B$$ is larger or equal to $$C$$ and $$No$$ otherwise.

#### Sample Input

10 10 100

#### Sample Output

Yes

#### Sample Input

6 7 43

#### Sample Output

No