// PROGRAM product2

#include "TrueBASIC.h"
int main();

int main()
{
    double a, force, m;
    char Stmp1_[_LBUFF_];

    printf("? ");
    fgets(Stmp1_, _LBUFF_, stdin);
    sscanf(Stmp1_, "%lg", &m);
    printf("acceleration a (mks units) = ");
    fgets(Stmp1_, _LBUFF_, stdin);
    sscanf(Stmp1_, "%lg", &a);
    force = m*a;                            // 力，単位は N(ニュートン)
    printf("force (in Newtons) = %f\n", force);

    return 0;
}