The original price of a microwave oven is 800 yuan. Now it is sold at a 20% discount. What is the current price of each microwave oven?
一种微波炉原价是800元，现在打八折出售，现在每台售价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">800 * (4/5)</gadget>
<output>640</output>

<result>640</result>