Steve has 400 new emails in his inbox.  He moves half of them to the trash, and 40 percent of the remaining emails to his work folder.  How many emails are left in the inbox?
Trash:400/2=
<gadget id="calculator">400/2</gadget>
<output>200</output>
200
400-200=
<gadget id="calculator">400-200</gadget>
<output>200</output>
200 remaining.
Work:200(.40)=80
200-80=
<gadget id="calculator">200-80</gadget>
<output>120</output>
120 remaining.

<result>120</result>