2.2*3.7+6.3*2.2．
2.2*3.7+6.3*2.2．
<gadget id="calculator">2.2 * 3.7</gadget>
<output>8.14</output>

<gadget id="calculator">6.3 * 2.2</gadget>
<output>13.86</output>

<gadget id="calculator">8.14 + 13.86</gadget>
<output>22</output>

<result>22</result>