Simple calculation: 284-123+166-177=
简算：284-123+166-177=
<gadget id="calculator">284 - 123</gadget>
<output>161</output>

<gadget id="calculator">166 - 177</gadget>
<output>-11</output>

<gadget id="calculator">161 + (-11)</gadget>
<output>150</output>

<result>150</result>