In a division formula, the dividend is 15 times the divisor, and the quotient is 3 times the divisor. What is the dividend?
在一道除法算式中，被除数是除数的15倍，商是除数的3倍，被除数是多少．
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 15</gadget>
<output>75</output>

<result>75</result>