public NumericIndicator squared() {
        // TODO: implement pow(n); a few others
        return this.multipliedBy(this);
    }
@Test
    public void squared() {
        final NumericIndicator numericIndicator = NumericIndicator.of(cp1);
        final NumericIndicator dynamicOp = numericIndicator.squared();
        assertNumEquals(1, dynamicOp.getValue(0));
        assertNumEquals(81, dynamicOp.getValue(8));
    }