Math Problem Solver

$$2 \pi \cdot 11.4 = \frac{114 \pi}{5} \approx 71.62831250184728583694826913877267$$

$$\begin{aligned}2 \pi \cdot 11.4&=2 \cdot \pi \cdot \left(11 + \frac{4}{10}\right)\\&=2 \cdot \pi \cdot \left(11 + \frac{2}{5}\right)\\&=2 \cdot \pi \cdot \frac{57}{5}\\&=\frac{114}{5} \cdot \pi\end{aligned}$$