Simple operation: 17.2*5.4+28*0.54.
简便运算：17.2*5.4+28*0.54．
<gadget id="calculator">17.2 * 5.4</gadget>
<output>92.88</output>

<gadget id="calculator">28 * 0.54</gadget>
<output>15.12</output>

<gadget id="calculator">92.88 + 15.12</gadget>
<output>108</output>

<result>108</result>