The divisor is 7, the quotient is 254, and the remainder is 4. What is the dividend?
除数是7，商是254，余数是4，被除数是多少？
<gadget id="calculator">254 * 7</gadget>
<output>1_778</output>

<gadget id="calculator">1_778 + 4</gadget>
<output>1_782</output>

<result>1_782</result>