#include <stdio.h>
int main() {
    float       x23 ;
    float       z_230 = 1e1;
    float       t_340 = 10.;
    float    oo=1./2*2*1/2;
    const float loss = 6.28318/oo*1./4. ;


    printf("%f %f %f \n",loss, z_230, t_340);
    x23  = loss * z_230 *  t_340;
    printf("resultat = %f\n",x23);

}