The original price of a set of suits is 350 yuan, and after the business conducts activities, it will be sold at a 20% discount. How much is the discount for this suit?
一套西服原价350元，商家搞活动后打八折出售，这套西服打折后降低了多少元．
<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">350 * (1/5)</gadget>
<output>70</output>

<result>70</result>