Teacher Zhang from the school goes to the store to buy 8 basketballs and 8 volleyballs. The unit price of basketballs is 73 yuan, and the unit price of volleyballs is 65 yuan. How much more will it cost to buy basketballs than to buy volleyballs?
学校张老师到商店买8个篮球和8个排球，篮球的单价是73元，排球的单价是65元，买篮球比买排球多用多少元？
<gadget id="calculator">73 * 8</gadget>
<output>584</output>

<gadget id="calculator">65 * 8</gadget>
<output>520</output>

<gadget id="calculator">584 - 520</gadget>
<output>64</output>

<result>64</result>