Solve: (0.1)(0.15)(3)(0.05) - Decimal Number Multiplication

To solve this problem, we'll follow these steps:

• Step 1: Multiply $0.1$ and $0.15$.
• Step 2: Multiply the result by $3$.
• Step 3: Multiply the next result by $0.05$.

Now, let's work through each step:

Step 1:
Multiply $0.1$ by $0.15$.
$0.1 \times 0.15 = 0.015$

Step 2:
Now multiply the result $0.015$ by $3$.
$0.015 \times 3 = 0.045$

Step 3:
Finally, multiply the result $0.045$ by $0.05$.
$0.045 \times 0.05 = 0.00225$

Therefore, the solution to the problem is $0.00225$.