(57+83*57)/57=how much.
(57+83*57)/57=多少．
<gadget id="calculator">83 * 57</gadget>
<output>4_731</output>

<gadget id="calculator">57 + 4_731</gadget>
<output>4_788</output>

<gadget id="calculator">4_788 / 57</gadget>
<output>84</output>

<result>84</result>