361-78+119-22=how much, so counting is simple.
361-78+119-22=多少，这样计数简便．
<gadget id="calculator">361 - 78</gadget>
<output>283</output>

<gadget id="calculator">119 - 22</gadget>
<output>97</output>

<gadget id="calculator">283 + 97</gadget>
<output>380</output>

<result>380</result>