Calculation: When a certain number is divided by 7.5, Ning Ning regards the division sign as the multiplication sign and gets 225. What is the correct answer?
计算：某数除以7.5时，宁宁把除号看成乘号，得到225，正确答案是多少．
<gadget id="calculator">225 / 7.5 / 7.5</gadget>
<output>4</output>

<result>4</result>