Dino does some online gig work for a living.  He works 20 hours a month making $10 an hour.  He works 30 hours a month making $20 an hour.  He works 5 hours a month making $40 an hour.  He pays $500 a month in expenses.  How much money does Dino have left at the end of the month?
Dino works 20 hours at a rate of $10 an hour, which means that work pays him 20*10=
<gadget id="calculator">20*10</gadget>
<output>200</output>
200 dollars a month.
Dino works 30 hours at a rate of $20 an hour, which means that work pays him 30*20=
<gadget id="calculator">30*20</gadget>
<output>600</output>
600 dollars a month.
Dino works 5 hours at a rate of $40 an hour, which means that work pays him 5*40=
<gadget id="calculator">5*40</gadget>
<output>200</output>
200 dollars a month.
Altogether, this means Dino makes 200+200+600= 
<gadget id="calculator">200+200+600</gadget>
<output>1_000</output>
1000 dollars a month.
You subtract Dino's expenses of 500 from this amount, meaning he has 1000-500=
<gadget id="calculator">1000-500</gadget>
<output>500</output>
500 dollars at the end of the month.

<result>500</result>