Calculate with a simple method: 495*1.01-4.95.
用简便方法计算：495*1.01-4.95．
<gadget id="calculator">495 * 1.01</gadget>
<output>499.95</output>

<gadget id="calculator">499.95 - 4.95</gadget>
<output>495</output>

<result>495</result>