The price of a refrigerator is 978 yuan, and the price of a washing machine is 645 yuan. How much more expensive is a refrigerator than a washing machine?
一台冰箱的价格是978元，一台洗衣机的价格是645元，冰箱比洗衣机贵多少？
<gadget id="calculator">978 - 645</gadget>
<output>333</output>

<result>333</result>