In order to promote sales in a home appliance mall on New Year's Day, all electrical appliances will be discounted by 20%. After the discount, a washing machine is 220 yuan cheaper than the original price. How much is the original price of this washing machine?
元旦节某家电商城为了促销，所有电器实行八折优惠．一台洗衣机打折后比原价便宜了220元．这台洗衣机的原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">220 / (1/5)</gadget>
<output>1_100</output>

<result>1_100</result>