The original price of Haier refrigerator is 1760 yuan, but the manufacturer promotes it. After the price reduction, it is 1680 yuan. How much is the price reduction by the manufacturer? (with equation)
海尔冰箱原价1760元，厂家促销，降价后1680元，厂家降价多少元？(用方程)
<gadget id="calculator">1_760 - 1_680</gadget>
<output>80</output>

<result>80</result>