Just paid for subscription and the first thing i see " Unable to run" ![]()

package en.codegym.task.pro.task08.task0802;
/*
Utility class: part 2
*/
public class Solution {
public static double sqrt(double a) {
return Math.sqrt(a);
}
public static double cbrt(double a) {
return a * a * a;
}
public static double pow(int number, int power) {
if (power == 0) {
return 1;
}
int modulus = power < 0 ? power * -1 : power;
int result = number;
for (int i = 1; i < modulus; i++) {
result *= number;
}
return power < 0 ? 1.0 / result : result;
}
}