Aunt Yang typed a 1,000-character document, and she had already typed some, leaving 270 characters untyped. How many words has Aunt Yang typed?
杨阿姨打一份1000个字的文件，已经打了一些，还剩270个字没打．杨阿姨已经打了多少个字？
<gadget id="calculator">1_000 - 270</gadget>
<output>730</output>

<result>730</result>