2.005*390+20.05*41+200.5*2=how much.
2.005*390+20.05*41+200.5*2=多少．
<gadget id="calculator">2.005 * 390</gadget>
<output>781.95</output>

<gadget id="calculator">20.05 * 41</gadget>
<output>822.05</output>

<gadget id="calculator">200.5 * 2</gadget>
<output>401</output>

<gadget id="calculator">781.95 + 822.05 + 401</gadget>
<output>2_005</output>

<result>2_005</result>