public function testPowerAndDivide()
{
$decimal = new Decimal(3);
$this->assertEquals(27, $decimal->power(3));
$this->assertEquals(1, $decimal->divide(3));
$decimal->setMutable(true);
$this->assertEquals(27, $decimal->power(3));
$this->assertEquals(3, $decimal->divide(3, 3));
$decimal2 = new Decimal(3);
$this->assertEquals(27, $decimal->power($decimal2));
}