Simple calculation: 3.65+3.65*1.2-1.2.
简算：3.65+3.65*1.2-1.2．
<gadget id="calculator">3.65 * 1.2</gadget>
<output>4.38</output>

<gadget id="calculator">4.38 - 1.2</gadget>
<output>3.18</output>

<gadget id="calculator">3.65 + 3.18</gadget>
<output>6.83</output>

<result>6.83</result>