In a division formula, the product of the quotient and the divisor is 2400, and the remainder is 15. What is the dividend?
在一个除法算式里，商和除数相乘的积是2400，余数是15，被除数是多少．
<gadget id="calculator">2_400 + 15</gadget>
<output>2_415</output>

<result>2_415</result>