4/3*3,14*1/2 одна вторая в кубе

Ответ:

$\frac{4}{3} \times 3.14 \times \frac{1}{2} {}^{2} = \frac{4}{3} \times 3.14 \times \frac{1}{4} = \frac{4}{3} \times \frac{157}{200} = 1 \frac{7}{150} \\ ( \frac{1}{2} ) {}^{2} = \frac{1}{4} \\ 3.14 \times \frac{1}{4} = 3 \frac{14}{100} \times \frac{1}{4} = \frac{157}{50} \times \frac{1}{4} = \frac{157}{200} \\ \frac{4}{3} \times \frac{157}{200} = \frac{628}{600} = 1 \frac{7}{150}$