We need to evaluate the expression $\frac{9\pi}{10} \times 133.94$.

ArithmeticArithmetic OperationsMultiplicationApproximationDecimal NumbersPi
2025/3/13

1. Problem Description

We need to evaluate the expression 9π10×133.94\frac{9\pi}{10} \times 133.94.

2. Solution Steps

First, we calculate 9π10\frac{9\pi}{10}.
We know that π3.14159\pi \approx 3.14159.
So, 9π10=9×3.1415910=28.2743110=2.827431\frac{9\pi}{10} = \frac{9 \times 3.14159}{10} = \frac{28.27431}{10} = 2.827431.
Next, we multiply this result by 133.94133.94.
2.827431×133.94378.70982.827431 \times 133.94 \approx 378.7098
We can round the answer to two decimal places, so the result is approximately 378.71378.71.

3. Final Answer

378.71378.71