Mother Li bought a piece of bread for 2.50 yuan and a bottle of soy sauce for 4.80 yuan. She gave the salesperson 10 yuan. How much should the salesperson give to her mother?
李妈妈买了1块面包2.50元，还买了1瓶酱油4.80元，她交给售货员10元，售货员应找给妈妈多少元？
<gadget id="calculator">2.5 + 4.8</gadget>
<output>7.3</output>

<gadget id="calculator">10 - 7.3</gadget>
<output>2.7</output>

<result>2.7</result>