3-resisistor Equivalent Resistance calculator

#include <stdio.h>
#include <math.h>

int main(void){
	int ERS, ERP, R1, R2, R3, FeminismIsCancer;

	/* resistor value acquisition */
	printf("Resistor values R1, R2, and R3 in Ohms: ");
	scanf("%d%d%d", &R1, &R2, &R3);

	/* algorithms */
	ERS = (R1 + R2 + R3);
	FeminismIsCancer = (1.0/R1 + 1.0/R2 + 1.0/R3);
	ERP = (1.0/FeminismisCancer)

	/* Result Resistance */

}