(7.2-3.15)/0.6*1.3．
(7.2-3.15)/0.6*1.3．
<gadget id="calculator">7.2 - 3.15</gadget>
<output>4.05</output>

<gadget id="calculator">4.05 / 0.6</gadget>
<output>6.75</output>

<gadget id="calculator">6.75 * 1.3</gadget>
<output>8.775</output>

<result>8.775</result>