Jame gets a raise to $20 per hour and works 40 hours a week.  His old job was $16 an hour for 25 hours per week.  How much more money does he make per year in his new job than the old job if he works 52 weeks a year?
He makes 20*40=$
<gadget id="calculator">20*40</gadget>
<output>800</output>
800 per week.
He used to make 16*25=$
<gadget id="calculator">16*25</gadget>
<output>400</output>
400 per week.
So his raise was 800-400=$
<gadget id="calculator">800-400</gadget>
<output>400</output>
400 per week.
So he makes 400*52=$
<gadget id="calculator">400*52</gadget>
<output>20_800</output>
20,800 per year more.

<result>20_800</result>