999+999-999*999/999*2=
999+999-999*999/999*2=
<gadget id="calculator">999 / 999</gadget>
<output>1</output>

<gadget id="calculator">999 * 1 * 2</gadget>
<output>1_998</output>

<gadget id="calculator">999 - 1_998</gadget>
<output>-999</output>

<gadget id="calculator">999 + (-999)</gadget>
<output>0</output>

<result>0</result>