A laptop is priced at 7400 yuan. Teacher Wang currently has a deposit of 6,500 yuan. If he deposits 90 yuan a month from now on, how many months will it take to buy a computer?
一台笔记本电脑售价7400元．王老师目前有存款6500元，如果从现在起，每月存款90元，需要几个月才能买上电脑？
<gadget id="calculator">7_400 - 6_500</gadget>
<output>900</output>

<gadget id="calculator">900 / 90</gadget>
<output>10</output>

<result>10</result>