Solve the following fraction multiplication problems: Problem 1: 12/4 16/12 12/4 Problem 2: 16/12 16/4 12/4

$$\frac{12}{4} \times \frac{16}{12} \times \frac{12}{4}$$

Cancel 12 (numerator of the first fraction) and 12 (denominator of the second fraction): $12 \div 12 = 1$.
The expression becomes:

$$\frac{1}{4} \times \frac{16}{1} \times \frac{12}{4}$$

Cancel 16 (numerator of the second fraction) and 4 (denominator of the first fraction): $16 \div 4 = 4$, $4 \div 4 = 1$.
The expression becomes:

$$\frac{1}{1} \times \frac{4}{1} \times \frac{12}{4}$$

Cancel 4 (numerator of the second fraction) and 4 (denominator of the third fraction): $4 \div 4 = 1$.
The expression becomes:

$$\frac{1}{1} \times \frac{1}{1} \times \frac{12}{1}$$

$$\frac{1 \times 1 \times 12}{1 \times 1 \times 1} = \frac{12}{1} = 12$$

The final answer is $\boxed{\text{12}}$.

: $\frac{16}{12} \times \frac{16}{4} \times \frac{12}{4}$

$$\frac{16}{12} \times \frac{16}{4} \times \frac{12}{4}$$

Cancel 12 (denominator of the first fraction) and 12 (numerator of the third fraction): $12 \div 12 = 1$.
The expression becomes:

$$\frac{16}{1} \times \frac{16}{4} \times \frac{1}{4}$$

Cancel 16 (numerator of the first fraction) and 4 (denominator of the second fraction): $16 \div 4 = 4$, $4 \div 4 = 1$.
The expression becomes:

$$\frac{4}{1} \times \frac{16}{1} \times \frac{1}{4}$$

Cancel 4 (numerator of the first fraction) and 4 (denominator of the third fraction): $4 \div 4 = 1$.
The expression becomes:

$$\frac{1}{1} \times \frac{16}{1} \times \frac{1}{1}$$

$$\frac{1 \times 16 \times 1}{1 \times 1 \times 1} = \frac{16}{1} = 16$$

The final answer is $\boxed{\text{16}}$.