Solve the following multiplication problems: (c) 4 × 4261 × 25 (d) 184 × 125

The expression is:

$$4 \times 4261 \times 25$$

We can group 4 and 25 together.

$$(4 \times 25) \times 4261$$

$$4 \times 25 = 100$$

Substitute this value back into the expression:

$$100 \times 4261$$

Multiplying by 100 means adding two zeros to the end of the number.

$$100 \times 4261 = 426100$$

The final answer is $\boxed{426100}$.

The expression is:

$$184 \times 125$$

We know that $125 = \frac{1000}{8}$.
So, the expression becomes:

$$184 \times \frac{1000}{8}$$

$$\frac{184}{8} = 23$$

Substitute this value back into the expression:

$$23 \times 1000$$

Multiplying by 1000 means adding three zeros to the end of the number.

$$23 \times 1000 = 23000$$

The final answer is $\boxed{23000}$.