Расчет: nvrTXT - 1
R =
* S
| a* b* c |
| / 4 |
|
R =
* S$$R$$ = $$\frac{a\cdot b\cdot c}{4}\cdot S$$
| a* b* c |
| / 4 |
R =
$$R$$ = $$\frac{S\cdot a\cdot b\cdot c}{4}$$
| S* a* b* c |
| / 4 |
R = 0.25* S* a* b* c$$R$$ = $$0.25\cdot S\cdot a\cdot b\cdot c$$