The original price of a microwave oven is 800 yuan, and now it is sold at a 10% discount. How much is the price of each microwave oven now?
一种微波炉原价是800元，现在以九折出售，现在每台售价多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">800 * (9/10)</gadget>
<output>720</output>

<result>720</result>