```python
def is_multiply_prime(a):
    """Write a function that returns true if the given number is the multiplication of 3 prime numbers
    and false otherwise.
    Knowing that (a) is less then 100. 
    Example:
    is_multiply_prime(30) == True
    30 = 2 * 3 * 5
    """
    def is_prime(n):
        if n < 2:
            return False
        for i in range(2, int(n**0.5) + 1):
            if n % i == 0:
                return False
        return True
    
    # Find all prime factors of a
    prime_factors = []
    temp = a
    for i in range(2, a + 1):
        if temp % i == 0:
            if is_prime(i):
                prime_factors.append(i)
                temp //= i
                # Continue dividing by the same prime
                while temp % i == 0:
                    prime_factors.append(i)
                    temp //= i
        if temp == 1:
            break
    
    # Check if there are exactly 3 prime factors (counting multiplicity)
    return len(prime_factors) == 3
```