12.78*9.9+1.278=how much.
12.78*9.9+1.278=多少．
<gadget id="calculator">12.78 * 9.9</gadget>
<output>126.522</output>

<gadget id="calculator">126.522 + 1.278</gadget>
<output>127.8</output>

<result>127.8</result>