New Century Department Store held an event, and a handheld learning machine worth 1,000 yuan was sold at a 20% discount. Zhang Ming has a VIP card, and can get another 10% discount. How much does Zhang Ming only need to spend to buy this handheld learning machine?
新世纪百货搞活动，一部价值1000元的掌上学习机打八折出售．张明有贵宾卡，还可以再打九折，张明要买这部掌上学习机只需花多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1_000 * (4/5) * (9/10)</gadget>
<output>720</output>

<result>720</result>