There are 689 boys in Xincheng Primary School, 145 fewer girls than boys. How many girls are required, and how many are the correct ones?
新城小学有男生689人，女生比男生少145人．要求女生有多少人，列式正确的是多少
<gadget id="calculator">689 - 145</gadget>
<output>544</output>

<result>544</result>