An electronics seller bought 5 phones for $700 each and gives the seller $4000 in dollar bills. How much will the seller give back in change?
The seller bought the 5 phones for $700 * 5 = $
<gadget id="calculator">700*5</gadget>
<output>3_500</output>
3500.
So the seller gives back $4000-$3500 = $
<gadget id="calculator">4000-3500</gadget>
<output>500</output>
500.

<result>500</result>