To calculate \(30 \times 40\), you can break it down as follows:
\[ 30 \times 40 = 30 \times (4 \times 10) = (30 \times 4) \times 10 \]
First, calculate \(30 \times 4\):
\[ 30 \times 4 = 120 \]
Now, multiply by 10:
\[ 120 \times 10 = 1200 \]
So, \(30 \times 40 = 1200\).
The correct response is 1,200.