Method multiply

java/lib/src/main/java/io/github/ccxt/Helpers.java:431–445

(Object a, Object b)

    }

    public static Object multiply(Object a, Object b) {
        a = normalizeIntIfNeeded(a);
        b = normalizeIntIfNeeded(b);
        if (a == null || b == null) return null;

        if (a instanceof Long && b instanceof Long) {
            return ((Long) a) * ((Long) b);
        }
        double res = toDouble(a) * toDouble(b);
        if (IsInteger(res)) {
            return (long) res;
        } else {
            return res;
        }
    }

    public static int getArrayLength(Object value) {
        if (value == null) return 0;