Michael loves to paint and sells his creations. He charges $100 for a large painting and $80 for a small painting. At his last art show, he sold 5 large paintings and 8 small paintings. How much did he earn in all?
He earned 5 x $100 = $
<gadget id="calculator">5*100</gadget>
<output>500</output>
500 for the large painting.
And he earned 8 x $80 = $
<gadget id="calculator">8*80</gadget>
<output>640</output>
640 for the small paintings.
Therefore, he earned a total of $500 + $640 = $
<gadget id="calculator">500+640</gadget>
<output>1_140</output>
1140 in all.

<result>1_140</result>